fix signature of this function and propagate errors from

fix signature of this function and propagate errors from

2008-01-16  Michael Natterer  <mitch@imendio.com>

	* gdk-pixbuf-io.c (save_to_stream): fix signature of this function
	and propagate errors from g_output_stream_write(). Return error
	also on incomplete writes (which don't generate an error by
	themselves).

	Unrelated:

	(gdk_pixbuf_io_init): initialize "builtin_module" on a separate
	line to avoid compiler warning in the common case of no built-in
	modules.

svn path=/trunk/; revision=19378