error_mprintf_c(color.i4.v, log_it.i4.v, format_string.i1a.r
			[,value_1, value_2, ...])

	This routine displays a formatted error message on a TV or graphics
	window.  The format string should be suitable for passing to
	clib_sprintf.  A previous call to error_init(_c) is necessary.

	color		color of text message (Note: If the color is RED,
			it will be treated by the error trace routines
			and some other facilities as an error.)
			(constants are in 'cnsparam')
	log_it		logging flag
			(ERR_LOG_IT -> write message to log specified in
			 ERR_NO_LOG -> display message only)
	format_string	null terminated string which contains the
			characters to be written literally or converted
			as specified by the optional value arguments
	[value_1...]	optional values which correspond to conversion
			expressions in the format string

	This function requires the following include files:

	cnsparam_h, cbslib_h

	Related functions:

	error_message(_c), error_cmprintf_c, error_printf_c, error_display(_c),
	error_colored_message_c, error_init(_c), error_imbedded_enabled,
	error_imbedded_on, error_imbedded_off, error_erase, error_close,
	error_last, error_clip_depth_c, error_query_clipping, error_trace_on,
	error_trace_off, error_trace_get, error_trace_view_c,
	error_size_and_position_c, clib_vsprintf, error_is_occluded,
	error_window_is_present, intro_error

	C/C++ usage:

	static const char	format_string[] = "This is a formatted error message for %F.";
	int	color = CYAN;
	int	log_it = ERR_NO_LOG;