From 3e6358113acf61e0c68419bec6cc68a29603a2ec Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Alberts=20Muktup=C4=81vels?= <alberts.muktupavels@gmail.com>
Date: Fri, 30 Sep 2022 17:04:04 +0300
Subject: window: return _NET_WM_PID when XRes is not available

To use XResQueryClientIds we need XRes 1.2 or newer!

https://gitlab.gnome.org/GNOME/libwnck/-/issues/154
---
 src/core/window.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/core/window.c b/src/core/window.c
index 1512a18e..194f42b7 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -9298,6 +9298,9 @@ meta_window_remove_pending_unmap (MetaWindow *window,
 pid_t
 meta_window_get_client_pid (MetaWindow *self)
 {
+  if (!META_DISPLAY_HAS_XRES (self->display))
+    return self->net_wm_pid;
+
   if (self->client_pid == -1)
     {
       XResClientIdSpec spec;
-- 
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