Core/Corpses: Fixed map crash happening during map unload when there are corpses inside

(cherry picked from commit 1d17475791)

src/server/game/Maps/Map.cpp

@@ -1580,11 +1580,18 @@ void Map::UnloadAll()
     }
 
     for (auto& cellCorpsePair : _corpsesByCell)
+    {
         for (Corpse* corpse : cellCorpsePair.second)
+        {
+            corpse->RemoveFromWorld();
+            corpse->ResetMap();
             delete corpse;
+        }
+    }
 
     _corpsesByCell.clear();
     _corpsesByPlayer.clear();
+    _corpseBones.clear();
 }
 
 // *****************************
@@ -3657,7 +3664,7 @@ Corpse* Map::ConvertCorpseToBones(ObjectGuid const& ownerGuid, bool insignia /*=
     {
         // Create bones, don't change Corpse
         bones = new Corpse();
-        bones->Create(corpse->GetGUID().GetCounter(), this);
+        bones->Create(corpse->GetGUID().GetCounter());
 
         for (uint8 i = OBJECT_FIELD_GUID + 4; i < CORPSE_END; ++i)                    // don't overwrite guid
             bones->SetUInt32Value(i, corpse->GetUInt32Value(i));