Set uv_crop_height/width in all the places

When configuring the buffer make sure to set all the (now) required
fields. Use the canonical variables and match the style from vpx_scale.

https://code.google.com/p/webm/issues/detail?id=841

Change-Id: I71b43d4a03756b8b2d6d60fdf8d7bf41b8041787
2 files changed