Core/Scripts: added missing null checks for DamageInfo struct

(cherry picked from commit 666422d82751439aaf3ddd05dae086900dffcbf2)

# Conflicts:
#	src/server/scripts/Spells/spell_dk.cpp
#	src/server/scripts/Spells/spell_mage.cpp
#	src/server/scripts/Spells/spell_paladin.cpp
#	src/server/scripts/Spells/spell_priest.cpp
#	src/server/scripts/Spells/spell_rogue.cpp
#	src/server/scripts/Spells/spell_shaman.cpp
#	src/server/scripts/Spells/spell_warlock.cpp
#	src/server/scripts/Spells/spell_warrior.cpp

5 files changed, 27 insertions, 8 deletions

diff --git a/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_devourer_of_souls.cpp b/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_devourer_of_souls.cpp
index b00ee7ff6d6..62c649f97c8 100644
--- a/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_devourer_of_souls.cpp
+++ b/src/server/scripts/Northrend/FrozenHalls/ForgeOfSouls/boss_devourer_of_souls.cpp
@@ -405,7 +405,11 @@ class spell_devourer_of_souls_mirrored_soul_proc : public SpellScriptLoader
             void HandleProc(AuraEffect const* /*aurEff*/, ProcEventInfo& eventInfo)
             {
                 PreventDefaultAction();
-                int32 damage = int32(CalculatePct(eventInfo.GetDamageInfo()->GetDamage(), 45));
+                DamageInfo* damageInfo = eventInfo.GetDamageInfo();
+                if (!damageInfo || !damageInfo->GetDamage())
+                    return;
+
+                int32 damage = CalculatePct(static_cast<int32>(damageInfo->GetDamage()), 45);
                 GetTarget()->CastCustomSpell(SPELL_MIRRORED_SOUL_DAMAGE, SPELLVALUE_BASE_POINT0, damage, GetCaster(), true);
             }
 
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_blood_queen_lana_thel.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_blood_queen_lana_thel.cpp
index 1b2212d9ddc..b5de16670bc 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_blood_queen_lana_thel.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_blood_queen_lana_thel.cpp
@@ -729,8 +729,12 @@ class spell_blood_queen_essence_of_the_blood_queen : public SpellScriptLoader
             void OnProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
             {
                 PreventDefaultAction();
-                int32 heal = CalculatePct(int32(eventInfo.GetDamageInfo()->GetDamage()), aurEff->GetAmount());
-                GetTarget()->CastCustomSpell(SPELL_ESSENCE_OF_THE_BLOOD_QUEEN_HEAL, SPELLVALUE_BASE_POINT0, heal, GetTarget(), TRIGGERED_FULL_MASK, NULL, aurEff);
+                DamageInfo* damageInfo = eventInfo.GetDamageInfo();
+                if (!damageInfo || !damageInfo->GetDamage())
+                    return;
+
+                int32 heal = CalculatePct(static_cast<int32>(damageInfo->GetDamage()), aurEff->GetAmount());
+                GetTarget()->CastCustomSpell(SPELL_ESSENCE_OF_THE_BLOOD_QUEEN_HEAL, SPELLVALUE_BASE_POINT0, heal, GetTarget(), TRIGGERED_FULL_MASK, nullptr, aurEff);
             }
 
             void Register() override
diff --git a/src/server/scripts/Northrend/IcecrownCitadel/boss_the_lich_king.cpp b/src/server/scripts/Northrend/IcecrownCitadel/boss_the_lich_king.cpp
index 75d4e8dda85..e6c56e9c38b 100644
--- a/src/server/scripts/Northrend/IcecrownCitadel/boss_the_lich_king.cpp
+++ b/src/server/scripts/Northrend/IcecrownCitadel/boss_the_lich_king.cpp
@@ -2968,8 +2968,12 @@ class spell_the_lich_king_dark_hunger : public SpellScriptLoader
             void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
             {
                 PreventDefaultAction();
-                int32 heal = int32(eventInfo.GetDamageInfo()->GetDamage() / 2);
-                GetTarget()->CastCustomSpell(SPELL_DARK_HUNGER_HEAL, SPELLVALUE_BASE_POINT0, heal, GetTarget(), true, NULL, aurEff);
+                DamageInfo* damageInfo = eventInfo.GetDamageInfo();
+                if (!damageInfo || !damageInfo->GetDamage())
+                    return;
+
+                int32 heal = static_cast<int32>(damageInfo->GetDamage()) / 2;
+                GetTarget()->CastCustomSpell(SPELL_DARK_HUNGER_HEAL, SPELLVALUE_BASE_POINT0, heal, GetTarget(), true, nullptr, aurEff);
             }
 
             void Register() override
diff --git a/src/server/scripts/Northrend/Nexus/Oculus/oculus.cpp b/src/server/scripts/Northrend/Nexus/Oculus/oculus.cpp
index ed6c7c459bf..70ed4a83556 100644
--- a/src/server/scripts/Northrend/Nexus/Oculus/oculus.cpp
+++ b/src/server/scripts/Northrend/Nexus/Oculus/oculus.cpp
@@ -600,8 +600,11 @@ class spell_oculus_temporal_rift : public SpellScriptLoader
             void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
             {
                 PreventDefaultAction();
-                int32 amount = aurEff->GetAmount() + eventInfo.GetDamageInfo()->GetDamage();
+                DamageInfo* damageInfo = eventInfo.GetDamageInfo();
+                if (!damageInfo || !damageInfo->GetDamage())
+                    return;
 
+                int32 amount = aurEff->GetAmount() + damageInfo->GetDamage();
                 if (amount >= 15000)
                 {
                     if (Unit* caster = GetCaster())
diff --git a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_yogg_saron.cpp b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_yogg_saron.cpp
index 3846a69595b..fefec61a8de 100644
--- a/src/server/scripts/Northrend/Ulduar/Ulduar/boss_yogg_saron.cpp
+++ b/src/server/scripts/Northrend/Ulduar/Ulduar/boss_yogg_saron.cpp
@@ -2730,8 +2730,12 @@ class spell_yogg_saron_grim_reprisal : public SpellScriptLoader     // 63305
             void HandleProc(AuraEffect const* aurEff, ProcEventInfo& eventInfo)
             {
                 PreventDefaultAction();
-                int32 damage = CalculatePct(int32(eventInfo.GetDamageInfo()->GetDamage()), 60);
-                GetTarget()->CastCustomSpell(SPELL_GRIM_REPRISAL_DAMAGE, SPELLVALUE_BASE_POINT0, damage, eventInfo.GetDamageInfo()->GetAttacker(), true, NULL, aurEff);
+                DamageInfo* damageInfo = eventInfo.GetDamageInfo();
+                if (!damageInfo || !damageInfo->GetDamage())
+                    return;
+
+                int32 damage = CalculatePct(static_cast<int32>(damageInfo->GetDamage()), 60);
+                GetTarget()->CastCustomSpell(SPELL_GRIM_REPRISAL_DAMAGE, SPELLVALUE_BASE_POINT0, damage, damageInfo->GetAttacker(), true, nullptr, aurEff);
             }
 
             void Register() override