Core/ScriptSystem: Add compile time type check of function assigned to hooks -

prevents incorrect function calls. Since this rev you have to put
PrepareAuraScript(<yourscriptclassnamehere>) at the beginning of every aura
script.

--HG--
branch : trunk

src/server/scripts/Spells/spell_item.cpp

@@ -684,6 +684,7 @@ public:
     class spell_item_shadowmourne_AuraScript : public AuraScript
     {
     public:
+        PrepareAuraScript(spell_item_shadowmourne_AuraScript)
         spell_item_shadowmourne_AuraScript() : AuraScript() { }
 
         bool Validate(SpellEntry const* /*spellEntry*/)