A similar change was made as part of commit 76f15947af7, that added
bindings to all dialogs, and this duplication causes mkbrgo to be
called twice, the second time after the window has been destroyed.
As a result, an error window appears when the code tries to access
widgets.
Signed-off-by: Alexander Gavrilov <angavrilov@gmail.com> Signed-off-by: Paul Mackerras <paulus@samba.org>