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

Fix warning:
vf_mp.c: In function ‘end_frame’:
vf_mp.c:870: warning: unused variable ‘outlink’
Signed-off-by: NStefano Sabatini <stefano.sabatini-lala@poste.it>

Make the mp wrapper accept the syntax mp=filter=params as alternative
to mp=filter:params. The alternative syntax is sligthly more readable
and should simplify copy&paste of MPlayer filter strings to the mp
filter.

Done to keep ABI compatible. Otherwise this is just silly