[glib] gdbusserver: Fix a potential g_object_unref(NULL) call

[Philip Withnall <pwithnall src gnome org>]

commit c729f416fb07e723a8404e28241a8096ac438838
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Tue Nov 26 11:08:50 2013 +0000

    gdbusserver: Fix a potential g_object_unref(NULL) call
    
    This can happen if the hash table lookup for ‘noncefile’ fails, and
    hence the first ‘goto out’ is hit, at which point resolver is still
    NULL.
    
    Found with scan-build.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=113075

 gio/gdbusserver.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gio/gdbusserver.c b/gio/gdbusserver.c
index 30df5cb..1016efb 100644
--- a/gio/gdbusserver.c
+++ b/gio/gdbusserver.c
@@ -898,7 +898,7 @@ try_tcp (GDBusServer  *server,
 
  out:
   g_list_free_full (resolved_addresses, g_object_unref);
-  g_object_unref (resolver);
+  g_clear_object (&resolver);
   return ret;
 }