Fix a compiling error in ext-tx and var-tx
Fix a compiling error in ext-tx and var-tx

Change-Id: Icd4cd42b1b9fa9066cda3e33e487298c8d802546

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