From 762096628c69867f24bd0676520b7f3a811c6072 Mon Sep 17 00:00:00 2001
From: Julian Orth <ju.orth@gmail.com>
Date: Sun, 16 Oct 2022 21:43:26 +0200
Subject: [PATCH] os/connection: don't leave `port` uninitialized

If DISPLAY is set but does not start with `/`, `port` is now
initialized.

Fixes 83d0d911069d502232d719882cd1c5cd090defa1
---
 os/connection.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/os/connection.c b/os/connection.c
index 55f1cd32e..1d92b6013 100644
--- a/os/connection.c
+++ b/os/connection.c
@@ -1018,7 +1018,7 @@ ListenOnOpenFD(int fd, int noxauth)
         }
     }
 
-    if (!display_env) {
+    if (!display_env || display_env[0] != '/') {
         /* Just some default so things don't break and die. */
         snprintf(port, sizeof(port), ":%d", atoi(display));
     }