randr: first check pScrPriv before using the pointer at RRFirstOutput
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>
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@ -446,6 +446,9 @@ RRFirstOutput(ScreenPtr pScreen)
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RROutputPtr output;
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int i, j;
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if (!pScrPriv)
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return NULL;
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if (pScrPriv->primaryOutput && pScrPriv->primaryOutput->crtc)
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return pScrPriv->primaryOutput;
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