avformat/libgme: decrease score by 1, fixes probetest failure

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/rsd: Check channels and sample_rate fields

Fixes probetest failure

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
avformat/rsd: increase probe score, as misdetections are fixed

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