Merge branch 'master' of https://github.com/TrinityCore/TrinityCore
Core/Misc: Fix exploit

Fix exploit that allowed to duplicate stackable splitable items. If the item that cast the spell can't be found anymore, the spell is cancelled.

Fixes https://github.com/TrinityCore/TrinityCore/issues/11977
Merge branch 'master' of https://github.com/TrinityCore/TrinityCore
Merge branch 'master' of https://github.com/TrueWoW/TrinityCore