Core/Spells: updated Survival Instincts to Cataclysm

src/server/scripts/Spells/spell_druid.cpp

@@ -944,9 +944,7 @@ class spell_dru_survival_instincts_AuraScript : public AuraScript
 
     void AfterApply(AuraEffect const* aurEff, AuraEffectHandleModes /*mode*/)
     {
-        Unit* target = GetTarget();
-        int32 bp0 = target->CountPctFromMaxHealth(aurEff->GetAmount());
-        target->CastCustomSpell(target, SPELL_DRUID_SURVIVAL_INSTINCTS, &bp0, nullptr, nullptr, true);
+        GetTarget()->CastSpell(GetTarget(), SPELL_DRUID_SURVIVAL_INSTINCTS, true, nullptr, aurEff);
     }
 
     void AfterRemove(AuraEffect const* /*aurEff*/, AuraEffectHandleModes /*mode*/)