Always check for unrecoverable errors when xcb_poll_for_event() returns NULL. Our file descriptor *might* have become unreadable.
Always check for unrecoverable errors when xcb_poll_for_event()
returns NULL. Our file descriptor *might* have become unreadable.

bbidulock/mcwm,tkln/mcwm,bbidulock/mcwm,tkln/mcwm