Core/Spells: Fixed accessing freed memory after reloading spell_area

src/server/game/Spells/SpellMgr.cpp

@@ -2394,9 +2394,11 @@ void SpellMgr::LoadSpellAreas()
     uint32 oldMSTime = getMSTime();
 
     mSpellAreaMap.clear();                                  // need for reload case
+    mSpellAreaForAreaMap.clear();
     mSpellAreaForQuestMap.clear();
     mSpellAreaForQuestEndMap.clear();
     mSpellAreaForAuraMap.clear();
+    mSpellAreaForQuestAreaMap.clear();
 
     //                                                  0     1         2              3               4                 5          6          7       8         9
     QueryResult result = WorldDatabase.Query("SELECT spell, area, quest_start, quest_start_status, quest_end_status, quest_end, aura_spell, racemask, gender, autocast FROM spell_area");