From 9cd7b8108d670fca7f25af14e18845c3ff663af9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alberts=20Muktup=C4=81vels?= <alberts.muktupavels@gmail.com>
Date: Tue, 20 Sep 2022 15:40:22 +0300
Subject: handle: avoid segfault in invalidate_icons

Screens variable won't be initialized if default icon sizes are
set/changed before using wnck_screen_get_default.

https://bugs.launchpad.net/ubuntu/+source/libwnck3/+bug/1990263
---
 libwnck/wnck-handle.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/libwnck/wnck-handle.c b/libwnck/wnck-handle.c
index 710b754..fa11d3d 100644
--- a/libwnck/wnck-handle.c
+++ b/libwnck/wnck-handle.c
@@ -77,6 +77,9 @@ invalidate_icons (WnckHandle *self)
   Display *xdisplay;
   int i;
 
+  if (self->screens == NULL)
+    return;
+
   xdisplay = _wnck_get_default_display ();
 
   for (i = 0; i < ScreenCount (xdisplay); ++i)
-- 
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