This should prevent inconsistent results between identical encodes with
the superblock experiment turned on.
Change-Id: I41a005fae53f2eb59736cc70041185fb7d63cfca
there are still a couple type of warning left, which are related to
double constants assigned to float type. As those would be addressed
by the conversion of transforms into integer version. This commit
has left those un-dealt with.
Change-Id: I48fd9b489c0c27ad6b543f4177423419f929f2bb