Fixed Bug 7833
Fixed Bug 7833

instance custom map names no longer linger in the index after the instance is destroyed
http://hercules.ws/board/tracker/issue-7833-instancing-issues/

Signed-off-by: shennetsind <d2875a25db4b1dbc5c3b90f5ac80c894b5d6c5e5@henn.et>

Nipol/Siesta,Nipol/Siesta,Nipol/Siesta