Core/Spells: Fixed Ignite talent getting removed by Ice Block

Closes #138

src/server/game/Spells/SpellMgr.cpp

@@ -767,6 +767,9 @@ bool SpellMgr::_isPositiveEffect(uint32 spellId, uint32 effIndex, bool deep) con
             // Amplify Magic, Dampen Magic
             if (spellproto->SpellFamilyFlags[0] == 0x00002000)
                 return true;
+            // Ignite
+            if (spellproto->SpellIconID == 45)
+                return true;
             break;
         case SPELLFAMILY_PRIEST:
             switch (spellId)