NAME
	ClearRectRegion -- Perform 2d CLEAR operation of rectangle
			with region, leaving result in region.

   SYNOPSIS
	status = ClearRectRegion(region,rectangle)
	 d0	 	 	  a0 	  a1

	BOOL ClearRectRegion(struct Region *, struct Rectangle * );

   FUNCTION
	Clip away any portion of the region that exists inside
	of the rectangle. Leave the result in region.

   INPUTS
	region - pointer to Region structure
	rectangle - pointer to Rectangle structure

   RESULTS
	status - return TRUE if successful operation
		 return FALSE if ran out of memory

   BUGS

   SEE ALSO
	AndRectRegion() graphics/regions.h

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