INT 2D - dLite 1.0+ - CHECK FOR dPressed FILE AND GET COMPRESSED SIZE           
	AL = 12h
	AH = AMISAlternate Multiplex Interrupt Specification multiplex number for dLite
	BX = file handle
Return: CF clear if successful
	    DX:AX = size of compressed file
	CF set on error (not dPressed file)
SeeAlso: AL=10h"dLite",AL=11h"dLite"