Fix a bug in vp10_predict_intra_block
Fix a bug in vp10_predict_intra_block

Avoid mistakenly setting "have_right" as 0 for UV channel in blocks
of width no larger than 8.

Change-Id: Ic2b031e32f967a23fd118a052bf9edd7d5a3abe6

mbebenita/aom,smarter/aom,luctrudeau/aom,mbebenita/aom,GrokImageCompression/aom,smarter/aom,mbebenita/aom,mbebenita/aom,mbebenita/aom,luctrudeau/aom,GrokImageCompression/aom,smarter/aom,luctrudeau/aom,GrokImageCompression/aom,luctrudeau/aom,GrokImageCompression/aom,mbebenita/aom,smarter/aom,GrokImageCompression/aom,smarter/aom,GrokImageCompression/aom,luctrudeau/aom,mbebenita/aom,mbebenita/aom,smarter/aom,luctrudeau/aom,mbebenita/aom