patch 7.4.1713

Problem:    GTK GUI doesn't work on Wayland.
Solution:   Specify that only the X11 backend is allowed. (Simon McVittie)

src/version.c

@@ -748,6 +748,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1713,
 /**/
     1712,
 /**/