Use JISX decoder when (B code is encountered.
Use JISX decoder when (B code is encountered.

This is a small tweak.  The only place the ISO 2022 code "(B" will be
encountered is when decoding japanese, so it makes sense to decode it
in the JISX decoder.  This provides ASCII in G0 with ISO-IR 13 in G1.

dgobbi/vtk-dicom,dgobbi/vtk-dicom,dgobbi/vtk-dicom