Short: Patch MakeVPort() for scrollable copperlists

VPortPatch 	A very small 2.04-only utility that patches the graphics.lib-
		rary function MakeVPort() in such a way to avoid an annoying
		bug that keeps multipalette pictures from being correctly
		scrolled (multipalette pictures contain the new PCHG chunk
		which specifies line-by-line palette changes; hundreds of
		colors can be displayed even in hi-res with multitasking and
		full system compatibility).  Includes source.
		Author:  Sebastiano Vigna