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_hunter.cpp

@@ -345,6 +345,7 @@ public:
 
     class spell_hun_sniper_training_AuraScript : public AuraScript
     {
+        PrepareAuraScript(spell_hun_sniper_training_AuraScript)
         bool Validate(SpellEntry const * /*entry*/)
         {
             if (!sSpellStore.LookupEntry(SPELL_SNIPER_TRAINING_R1))