itself.
Use the fontconfig the font builder thread created (Fixed a few past
broken commits).
Fixed fontconfig lock (a unique lock for all instances).

helpers.

This reverts commit d9a4e679f03be137a6dc60e9b82050d7bba8408a.

Signed-off-by: Jean-Paul Saman <jpsaman@videolan.org>

quicktime decoder: I don't trust this codec enough to have it as priority 100 resetting back to 10. Besides, shouldn't we encourage ffmpeg codec usage over proprietary codecs ?

Fixed missing lock in aout callbacks !
Factorized duplicated code.