fix condition for tmvp #1120
in 8.5.2.11 Derivation process for temporal luma motion vector prediction: If ph_temporal_mvp_enabled_flag is equal to 0 or (cbWidth*cbHeight) is less than or equal to 32, both components of mvLXCol are set equal to 0 and availableFlagLXCol is set equal to 0
Fixed 12 to 32 as said in spec.
Edited by Pierrick Bouvier