INT 31 P - CauseWay - "ResMem" - RESIZE MEMORY BLOCK
	AX = FF0Dh
	BX = selector for block to be resized
	CX:DX = new size in bytes
Return: CF clear if successful
	CF set on error
Note:	the memory block may have to be copied to another location in order
	  to satisfy the requested new size, in which case the base address
	  of the selector is updated
SeeAlso: AX=FF0Bh,AX=FF0Eh,AX=FF12h