Core/Game: Fix some issues detected by static analysis.

* Possible inefficient checking for 'list' emptiness.

* Variable '_scheduledScripts' is assigned in constructor body.
  Consider performing initialization in initialization list.

* Variable 'Text' is assigned in constructor body.
  Consider performing initialization in initialization list.

* Possible inefficient checking for 'm_loadedScripts' emptiness.

(cherry picked from commit 9a61049f88)

Conflicts:
	src/server/game/Server/Packets/TicketPackets.cpp

src/server/game/AI/SmartScripts/SmartScript.cpp

@@ -3167,7 +3167,7 @@ void SmartScript::ProcessEvent(SmartScriptHolder& e, Unit* unit, uint32 var0, ui
                 std::list<Creature*> list;
                 me->GetCreatureListWithEntryInGrid(list, e.event.distance.entry, (float)e.event.distance.dist);
 
-                if (list.size() > 0)
+                if (!list.empty())
                     creature = list.front();
             }
 
@@ -3198,7 +3198,7 @@ void SmartScript::ProcessEvent(SmartScriptHolder& e, Unit* unit, uint32 var0, ui
                 std::list<GameObject*> list;
                 me->GetGameObjectListWithEntryInGrid(list, e.event.distance.entry, (float)e.event.distance.dist);
 
-                if (list.size() > 0)
+                if (!list.empty())
                     gameobject = list.front();
             }
 

src/server/game/Scripting/ScriptMgr.cpp

@@ -182,9 +182,8 @@ struct TSpellSummary
     uint8 Effects;                                          // set of enum SelectEffect
 } *SpellSummary;
 
-ScriptMgr::ScriptMgr() : _scriptCount(0)
+ScriptMgr::ScriptMgr() : _scriptCount(0), _scheduledScripts(0)
 {
-    _scheduledScripts = 0;
 }
 
 ScriptMgr::~ScriptMgr() { }

src/server/game/Spells/Spell.cpp

@@ -7140,7 +7140,7 @@ void Spell::CallScriptDestinationTargetSelectHandlers(SpellDestination& target,
 bool Spell::CheckScriptEffectImplicitTargets(uint32 effIndex, uint32 effIndexToCheck)
 {
     // Skip if there are not any script
-    if (!m_loadedScripts.size())
+    if (m_loadedScripts.empty())
         return true;
 
     for (std::list<SpellScript*>::iterator itr = m_loadedScripts.begin(); itr != m_loadedScripts.end(); ++itr)