xconfig: merge code path to conf_write()

Avoid to have multiple path saving the config. This fixes an error check
miss when the window is being closed and the user requested the config
to be written.

Reported-by: Hiromu Yakura <[email protected]>
Pointed-out-by: Michal Marek <[email protected]>
Signed-off-by: Michal Marek <[email protected]>
1 file changed