[glib] gdbus: fix false positive g_warning() in remove_filter()

[Matthias Clasen <matthiasc src gnome org>]

commit 005dfeacba142af598d57f28da1e7f79c17d8fe1
Author: Ole André Vadla Ravnås <oleavr gmail com>
Date:   Wed Mar 1 11:18:21 2017 +0100

    gdbus: fix false positive g_warning() in remove_filter()
    
    The GDBus thread might be holding a ref while requesting to remove the
    filter.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=779409

 gio/gdbusconnection.c |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/gio/gdbusconnection.c b/gio/gdbusconnection.c
index 17b0741..7c88a4e 100644
--- a/gio/gdbusconnection.c
+++ b/gio/gdbusconnection.c
@@ -3175,18 +3175,21 @@ g_dbus_connection_remove_filter (GDBusConnection *connection,
                                  guint            filter_id)
 {
   guint n;
+  gboolean found;
   FilterData *to_destroy;
 
   g_return_if_fail (G_IS_DBUS_CONNECTION (connection));
   g_return_if_fail (check_initialized (connection));
 
   CONNECTION_LOCK (connection);
+  found = FALSE;
   to_destroy = NULL;
   for (n = 0; n < connection->filters->len; n++)
     {
       FilterData *data = connection->filters->pdata[n];
       if (data->id == filter_id)
         {
+          found = TRUE;
           g_ptr_array_remove_index (connection->filters, n);
           data->ref_count--;
           if (data->ref_count == 0)
@@ -3204,7 +3207,7 @@ g_dbus_connection_remove_filter (GDBusConnection *connection,
       g_main_context_unref (to_destroy->context);
       g_free (to_destroy);
     }
-  else
+  else if (!found)
     {
       g_warning ("g_dbus_connection_remove_filter: No filter found for filter_id %d", filter_id);
     }