JVET-R0277 items 1 and 2: Modified condition for the number of active entries override flag, inference for slice_collocated_from_l0_flag
JVET-R0277: Modified condition for sh_num_ref_idx_active_override_flag, inference for slice_collocated_from_l0_flag equal to 1 for P-slices
Edited by Frank Bossen