[gnome-panel] run-dialog: check return value

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 665515fed95dcdf56e64f58e61e0b41a8b29815e
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Thu Mar 3 14:32:22 2022 +0200

    run-dialog: check return value
    
    Coverity CID: #1502711

 gnome-panel/panel-run-dialog.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/gnome-panel/panel-run-dialog.c b/gnome-panel/panel-run-dialog.c
index bea153a66..f83957f5e 100644
--- a/gnome-panel/panel-run-dialog.c
+++ b/gnome-panel/panel-run-dialog.c
@@ -314,7 +314,8 @@ set_environment (gpointer user_data)
 
   display = gdk_display_get_default ();
 
-  g_setenv ("DISPLAY", gdk_display_get_name (display), TRUE);
+  if (!g_setenv ("DISPLAY", gdk_display_get_name (display), TRUE))
+    g_warning ("Failed to set DISPLAY environment variable");
 }
 
 static void