INT 31 - CauseWay v1.3 - "ResMemSO" - RESIZE SELECTOR:OFFSET MEMORY BLOCK

	AX = FF2Dh
	SI:DI = selector:offset for memory block
	CX:DX = new size of block
Return: CF clear if successful
	   SI:DI = new selector:offset for memory block
	CF set on error
SeeAlso: AX=FF00h,AX=FF2Ch,AX=FF2Eh