NAME
       FreeRaster -- Release an allocated area to the system free memory pool
.
   SYNOPSIS
       FreeRaster( p, width, height)
		   a0   d0:16  d1:16
	void FreeRaster( PLANEPTR, USHORT, USHORT);
   FUNCTION
	Return the memory associated with this PLANEPTR of size
	width and height to the MEMF_CHIP memory pool.
   INPUTS
       p  =  a pointer to a memory space  returned  as  a
             result of a call to AllocRaster.
	width - the width in bits of the bitplane.
	height - number of rows in bitplane.
   BUGS
   NOTES
       Width and height should be the same values with which you
       called AllocRaster in the first place.
   SEE ALSO
	AllocRaster() graphics/gfx.h