INT 31 - Causeway v1.3 - "cwcLoad" - LOAD/EXPAND CWC-COMPRESSED FILE

	AX = FFFBh
	BX = source file handle
	ES:EDI -> memory buffer into which to expand file
Return: CF clear if successful
	    ECX = expanded data length
	CF set on error
	    EAX = error code (01h file error, 02h bad data, 03h not CWC file)
Note:	the provided file may consist of the concatenation of several CWC
	  files; the one beginning at the current file position will be
	  expanded
SeeAlso: AX=FF2Bh