From cbd91a260b8464d24254ce5ec29543b01b761a30 Mon Sep 17 00:00:00 2001
From: Zeno Rogue <zeno@attnam.com>
Date: Thu, 16 Apr 2026 23:46:51 +0200
Subject: [PATCH] fixup to dim_listener

---
 geometry.cpp | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/geometry.cpp b/geometry.cpp
index 22982dad..d4d69646 100644
--- a/geometry.cpp
+++ b/geometry.cpp
@@ -992,12 +992,14 @@ extern struct dim_listener *dl_list;
 struct dim_listener {
   dim_listener *next, **prev;
   dim_listener() {
-    dl_list->prev = &next;
+    if(dl_list) dl_list->prev = &next;
     next = dl_list;
     dl_list = this;
+    prev = &dl_list;
     }
   ~dim_listener() {
-    *prev = next; next->prev = prev;
+    if(next) next->prev = prev;
+    *prev = next;
     }
   virtual void on_dim_change() {}
   };