[PATCH] VidMode: prevent crash with no modes

[Chris Wilson]

Bugzilla:  https://bugs.freedesktop.org/show_bug.cgi?id=14731
Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
---
 hw/xfree86/common/xf86VidMode.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/hw/xfree86/common/xf86VidMode.c b/hw/xfree86/common/xf86VidMode.c
index 1788fa1..c22243a 100644
--- a/hw/xfree86/common/xf86VidMode.c
+++ b/hw/xfree86/common/xf86VidMode.c
@@ -221,6 +221,9 @@ VidModeGetFirstModeline(int scrnIndex, pointer *mode, int *dotClock)
 	return FALSE;
 
     pScrn = xf86Screens[scrnIndex];
+    if (pScrn->modes == NULL)
+	    return FALSE;
+
     pVidMode = VMPTR(pScrn->pScreen);
     pVidMode->First = pScrn->modes;
     pVidMode->Next =  pVidMode->First->next;
-- 
1.7.2.3