[gnome-panel] status-notifier: avoid useless warnings about missing properties

[Alberts Muktupāvels <muktupavels src gnome org>]

commit dad074279c451c296869725f6cbda2ce6c98af24
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Tue Dec 20 18:02:00 2016 +0200

    status-notifier: avoid useless warnings about missing properties

 modules/external/status-notifier/sn-item-v0.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/modules/external/status-notifier/sn-item-v0.c b/modules/external/status-notifier/sn-item-v0.c
index dbcb546..ef86a01 100644
--- a/modules/external/status-notifier/sn-item-v0.c
+++ b/modules/external/status-notifier/sn-item-v0.c
@@ -489,6 +489,12 @@ get_property (GObject      *source_object,
       return NULL;
     }
 
+  if (g_error_matches (error, G_DBUS_ERROR, G_DBUS_ERROR_INVALID_ARGS))
+    {
+      g_error_free (error);
+      return NULL;
+    }
+
   if (error)
     {
       g_warning ("%s", error->message);