Core/Spells: Fix vigilance taunt cooldown spell targeting. cleanup some whitespace

src/server/game/Entities/Unit/Unit.cpp

@@ -8322,6 +8322,12 @@ bool Unit::HandleProcTriggerSpell(Unit* victim, uint32 damage, AuraEffect* trigg
                     RemoveAuraFromStack(auraSpellInfo->Id);
                     return false;
                 }
+                if (auraSpellInfo->Id == 50720)
+                {
+                    target = triggeredByAura->GetCaster();
+                    if (!target)
+                        return false;
+                }
                 break;
             case SPELLFAMILY_WARLOCK:
             {