A small bug in 0.93-pre3

[Zhang Linbo <zlb lsec cc ac cn>]

Hi,

I just notice a possible bug in 0.93-pre3,
which can be illustrated by the following
steps:

1. Open an arbitrary dialog.

2. Make some changes to the dialog.

3. Right click on the dialog, and select 'File->Save'
to save the modified dialog.

4. Type Ctrl-Q to quit.

A warning message about modified diagrams is then popped up
(which shouldn't be, since the diagram has been saved).

Best regards,
LB