Stop discriminating against 32bpp ICOs a): Use the byte size of the image

Stop discriminating against 32bpp ICOs a): Use the byte size of the image

2003-06-28  Matthias Clasen  <maclas@gmx.de>

	* io-ico.c (DecodeHeader): Stop discriminating against 32bpp ICOs a): Use the byte
	size of the image as a heuristic when selecting the bitmap  to load - this lets us
	select 32bpp bitmaps which come after a 8bpp bitmap.
	(OneLineTransp): Stop discriminating against 32bpp ICOs b): Don't overwrite the
	alpha channel of 32bpp ICOs.
	(gdk_pixbuf__ico_image_load_increment): Stop decoding the header unnecessarily.