2004-11-13  Sven Neumann  <sven@gimp.org>

	* app/core/gimpimagefile.[ch]
	* app/file/file-open.c
	* app/file/file-save.c: pass the MIME type from the save procedure
	to gimp_imagefile_save_thumbnail() so that it can be stored with
	the thumbnail.

	* tools/pdbgen/pdb/fileops.pdb
	* app/pdb/fileops_cmds.c: changed accordingly.