Author: Andreas Beckmann <anbe@debian.org>
Description: fix building with GCC 15

--- a/xcb.c
+++ b/xcb.c
@@ -983,7 +983,7 @@ dogetseln (n, ptr, nb)
 static void
 dolist (list, fn, data, nbytes)
      char *list;
-     void (*fn) ();
+     void (*fn) (int, char *, int);
      char *data;
      int nbytes;
 {