2002-04-16  Michael Natterer  <mitch@gimp.org>

	* app/base/temp-buf.c: fixed temp_buf_copy() and
	temp_buf_to_[color|gray]() to (1) not crash and (2) to assume the
	correct pixelformat. Bugs were never noticed because the code was
	never used until today...

	* app/core/gimpviewable.c (gimp_viewable_get_new_preview_pixbuf):
	use temp_buf_copy() to convert GRAY* TempBufs to RGB* before
	creating the pixbuf.

	* app/app_procs.c: don't try to open command line images if the
	filename could not be converted to an URI.

	* app/file/file-open.c
	* app/file/file-save.c: use g_file_test() instead of stat().

	* app/file/file-utils.[ch]: cleanup, changed
	file_utils_filename_to_uri() to take a list of procs, not a Gimp
	pointer.

	* app/core/gimpimage.c: changed accordingly.

	* app/core/gimpimagefile.[ch]: implemented thumbnail saving
	following the thumbnail standard v0.5 (the implementation is not
	yet fully standard compliant).

	* app/gui/file-open-dialog.c: use the new thubmnail functions and
	removed all .xvpics code. Not finished yet...

	* app/core/gimpdocuments.c
	* app/widgets/gimpdocumentview.c: changed accordingly.

	* tools/pdbgen/pdb/fileops.pdb (file_save_thumbnail): set "success"
	correctly.

	* app/pdb/fileops_cmds.c: regenerated.