XPNDTV(cbuf.i1a.r, xbuf.sa.r, maxlen.i2.r, status.i2.r)

	This routine expands compressed TV text which was compressed by the 
	CPRSTV routine into TVMX format.

	text		user buffer of ASCII data and character attributes
	cbuf		buffer containing the compressed text
	xbuf		buffer to receive the expanded text in TVMX format
			(array of XCHAR structures)
	maxlen		length of 'xbuf'
	status		conversion status
			(<0 -> not enough room in 'xbuf' to do the conversion,
			 >0 -> number of entries used in 'xbuf')

	This function requires the following include files:

	cns_data_structs_h, clib_h

	Related functions:

	CPRSTV, window_tvdisp(_c), window_tvsave_c