Fix input events random delay on X11

The new system based on a thread gathering events from the X11 server
was causing delays in some scenarios where some events have just been
missed at the time of processing and we're waiting for a whole frame to
check them again.

Solved by flushing again and checking for pending events at the
beginning of the process loop, in addition to events already gathered
on the event thread.

0 files changed, 0 insertions, 0 deletions