[BUG] : possible deadlock

[Emmanuel <e allaud wanadoo fr>]

	Hi all,
there is IMO a possible deadlock in libbalsa_mailbox_imap_open 
(libbalsa/mailbox_imap.c). Indeed we grab the mailbox lock first (holding 
the gdk lock) then we release the gdk lock. This does not follow the 
threading rules in HACKING file. I guess it is OK because if another part 
of the code grabs the mailbox lock but not the gdk one it won't in general 
try to grab the gdk one after, so, that's only a guess, I think there 
could not be a deadlock. But still if we have these rules in HACKING we 
should follow them.
Bye
Manu