Fix a seg fault in case pScrPriv is NULL at ProcRRGetScreenInfo, which later calls RRFirstOutput. Signed-off-by: Ricardo Salveti de Araujo <ricardo.salveti@linaro.org> Reviewed-by: Keith Packard <keithp@keithp.com> Signed-off-by: Keith Packard <keithp@keithp.com>