Fix a bug in block mismatch debugging
Fix a bug in block mismatch debugging

Fix a bug in checking the block mode context.

Change-Id: Ia585f30e370f80a6e42bf5a2eb7ace0cf2d1f337

GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom,GrokImageCompression/aom