2004-04-13  Raphael Quinet  <quinet@gamers.org>

	* plug-ins/common/mng.c (query, run): Workaround for bug #139947:
	do not register the plug-in for INDEXED* modes and do not declare
	that it can handle INDEXED images in gimp_export_image().  This
	forces a conversion to RGB instead of generating broken indexed
	images.  The generation of correct indexed MNG files is likely to
	require a newer release of libmng.
	(mng_data): Set default compression level to 9 instead of 6.