CPL_UNUSED for pcidsk CreateCopy. (#5414)

git-svn-id: https://svn.osgeo.org/gdal/trunk/gdal@27762 f0d54148-0727-0410-94bb-9a71ac55c965
Wrap pszOpenOptionList so that it is compiled only when used. (#5414)

git-svn-id: https://svn.osgeo.org/gdal/trunk/gdal@27763 f0d54148-0727-0410-94bb-9a71ac55c965
Wrap bCopyFromJPEG and bDirectCopyFromJPEG so that they are only compiled in when used. (#5414)

git-svn-id: https://svn.osgeo.org/gdal/trunk/gdal@27764 f0d54148-0727-0410-94bb-9a71ac55c965