check for null dpy in Fake_glXGetConfig()

diff --git a/src/mesa/drivers/x11/fakeglx.c b/src/mesa/drivers/x11/fakeglx.c
index 1bab6d91a4189c6a3d42f752e900fa35a9a747f6..98003b085813b11ffb56d2e7ca76d2cd594c0d5c 100644 (file)
--- a/src/mesa/drivers/x11/fakeglx.c
+++ b/src/mesa/drivers/x11/fakeglx.c
@@ -1727,6 +1727,9 @@ Fake_glXGetConfig( Display *dpy, XVisualInfo *visinfo,
 {
    XMesaVisual xmvis;
 
+   if (!dpy || !visInfo)
+      return GLX_BAD_ATTRIBUTE;
+
    xmvis = find_glx_visual( dpy, visinfo );
    if (!xmvis) {
       /* this visual wasn't obtained with glXChooseVisual */