libX11/u_no-longer-crash-in-XVisualIDFromVisual.patch

diff -u -p -r libX11-1.7.2.orig/src/Misc.c libX11-1.7.2/src/Misc.c
--- libX11-1.7.2.orig/src/Misc.c	2021-11-15 14:58:41.579310000 +0100
+++ libX11-1.7.2/src/Misc.c	2021-11-15 15:01:27.897244000 +0100
@@ -57,6 +57,8 @@ XDisplayKeycodes(
 
 VisualID XVisualIDFromVisual(Visual *visual)
 {
+    if (!visual)
+        return (VisualID)0;
     return visual->visualid;
 }