Core/Scripts: Fixed Death and Decay

Closes #46

src/server/scripts/Spells/spell_dk.cpp

@@ -405,7 +405,7 @@ class spell_dk_death_and_decay : public SpellScriptLoader
 
             void Register() override
             {
-                OnEffectPeriodic += AuraEffectPeriodicFn(spell_dk_death_and_decay_AuraScript::HandleDummyTick, EFFECT_1, SPELL_AURA_PERIODIC_DUMMY);
+                OnEffectPeriodic += AuraEffectPeriodicFn(spell_dk_death_and_decay_AuraScript::HandleDummyTick, EFFECT_0, SPELL_AURA_PERIODIC_DUMMY);
             }
         };