2003-05-12  Dave Neary  <bolsh@gimp.org>

        * plug-ins/common/csource.c
        * plug-ins/common/jpeg.c
        * plug-ins/common/tiff.c: If no comment is set on a
        GimpImage when it arrives to be saved, don't attach one.
        Fixes bug #98490 - and removes code which does what is
        suggested in bug #98485 as correct behaviour.