text_buffer_add

	status.i4.v = text_buffer_add(string.i1a.r)

	This routine will add a line to a text buffer which can be displayed
	by a subsequent call to text_buffer_display_c.

	string		text string

	This function returns status values as follows:

	OK			success
	CBS_MEMFAIL		dynamic memory allocation failure

	This function requires the following include files:

	cbslib_h, acnet_errors_h

	Related functions:

	text_buffer_init_c, text_buffer_display_c