[Fixed for V0.45] RTC Editor teleport corruption

[Kain]

teleporter destination corrupting when level above teleporter is deleted.
trying to edit destination after corruption causes this exception:


RTC Editor (V0.44) Diagnostic file - Thu Mar 29 20:29:57 2007

Error:
an access violation exception.

Stack Dump:
RTCEditDlgSelectLocation.UpdateLevelView();
RTCEditDlgSelectLocation.OnInitDialog();
RTCEditCommon.SelectLocation(char 23, char 23, char -56);
RTCEditCommon.EditItem(pointer 0x02577E14, bool FALSE);
RTCEditDlgEdit.OnButtonEdit();
RTCEditDlgEdit.OnDblclkEditList();
RTCEditView.OnEditEdit();
RTCEditApp.WinMain();

[George Gilbert]

Fixed for V0.45