reverted the expose everything changes, I'm not sure why these went in.

reverted the expose everything changes, I'm not sure why these went in.

1999-07-16  Larry Ewing  <lewing@gimp.org>

	* src/testpixbuf.c (expose_func): reverted the expose everything
	changes, I'm not sure why these went in.
	(config_func): bring this up to date with the new pixbuf_scale
	semantics.

	* src/gdk-pixbuf-io.c: added a couple of warnings to the module
	loading code so that poeple can diagnose problems better.

	* src/gdk-pixbuf.c (gdk_pixbux_scale): fix the borkedness, also it
	no longer allocates a new pixbuf, which make things nicer for the
	rest of the code.  Unfortunately there is still a problem with
	scaling rgba images.