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x11: Avoid a division by zero

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This is similar to f44baf51d9 but for RandR 1.3 servers like
x11rdp and Windows Exceed which don't return a refresh rate. Avoid a
crash when that happens.

https://bugzilla.gnome.org/show_bug.cgi?id=775546
This commit is contained in:
Pavel Roskin 2018-03-08 15:58:42 +01:00 committed by Debarshi Ray
parent add3592809
commit cc967849f7
1 changed files with 2 additions and 1 deletions
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3
gdk/x11/gdkscreen-x11.c
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@ -658,7 +658,8 @@ init_randr13 (GdkScreen *screen, gboolean *changed)
XRRModeInfo *xmode = &resources->modes[j];
if (xmode->id == crtc->mode)
{
refresh_rate = (1000 * xmode->dotClock) / (xmode->hTotal *xmode->vTotal);
if (xmode->hTotal != 0 && xmode->vTotal != 0)
refresh_rate = (1000 * xmode->dotClock) / (xmode->hTotal * xmode->vTotal);
break;
}
}