Core/Spells: implement GetHitCorpse() helper

src/server/game/Spells/SpellScript.cpp

@@ -525,6 +525,16 @@ GameObject* SpellScript::GetHitGObj() const
     return m_spell->gameObjTarget;
 }
 
+Corpse* SpellScript::GetHitCorpse() const
+{
+    if (!IsInTargetHook())
+    {
+        TC_LOG_ERROR("scripts", "Script: `%s` Spell: `%u`: function SpellScript::GetHitCorpse was called, but function has no effect in current hook!", m_scriptName->c_str(), m_scriptSpellId);
+        return nullptr;
+    }
+    return m_spell->corpseTarget;
+}
+
 WorldLocation* SpellScript::GetHitDest() const
 {
     if (!IsInEffectHook())