Patch 4:
       - removal of g_bitDepth (and g_bitDepthInStream for best-effort
         decoding)
         Change g_bitDepth[chType] for sps.getBitDepth(ChType)
           For best-effort decoding, SPS contains a BitDepth structure.
             This contains 'recon'  - the reconstruction bit-depth
                       and 'stream' - the bit depth in stream.
             Normally these are the same, but with best-effort decoding,
             the 'recon' can be forced to a bit-depth other than that in
             the stream.

Patch-by: Karl Sharman <Karl.Sharman@eu.sony.com>