* rbultje/vp9-bugfixes:
vp9: match another find_ref_mvs() bug in libvpx.
vp9: fix scaled motion vector clipping for sub8x8 blocks.
vp9: improve signbias check.
vp9: don't allow compound references if error_resilience is enabled.
vp9: clamp segmented lflvl before applying ref/mode deltas.
vp9: reset loopfilter mode/ref deltas on keyframe.
vp9: fix crash when playing back 440/440 content with width%64<56.
vp9: extend loopfilter workaround for vp9 h/v mix-up to work for 422.
vp9: clip motion vectors in the same way as libvpx does.
vp9: set skip flag if the block had no coded coefficients.
vp9: apply mv scaling workaround only when subsampling is enabled.
vp9: read all 4x4 blocks in sub8x8 blocks individually with scalability.
vp9: fix segmentation map referencing upon framesize change.
vp9: disable more pmulhrsw optimizations in idct16/32.
vp9: disable all pmulhrsw in 8/16 iadst x86 optimizations.
Merged-by: Michael Niedermayer <michaelni@gmx.at>
