huffyuvdec: swap code blocks

The effect is not really deterministic, as it seems to be a combination
on x86_64 of fewer registers used, different jump offsets and, for all
archs, of likely branches.

Speedup is around 15%.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avcodec/huffyuvdec: assume vlcs can be 32 instead of 31 bits max

This should avoid a division as well

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
MAINTAINERS: Add Co maintainer for huffyuv*, rv4*, vc1*

Patch by: Christophe Gisquet
Commit Message by commiter

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>