Should also fix memory allocation issues with PicHeader.

if deblocking filter is disabled at PPS level, it is inferred to true if Slice  deblocking_params_present_flag is true. so, in this case, Slice DeblockingFilterOverrideFlag should not be true.

Align the QP of layer-1 picture with I-picture setting when B but only referring to an I picture of low layer (i.e. would be an I picture if layer was independent).