[empathy] don't pass a GError when first trying to start gnome-contacts

[Guillaume Desmottes <gdesmott src gnome org>]

commit c6cee47a6da4b09b42213dcd1d903979a0f54f57
Author: Guillaume Desmottes <guillaume desmottes collabora co uk>
Date:   Thu Aug 28 13:31:44 2014 +0200

    don't pass a GError when first trying to start gnome-contacts

 .../empathy-individual-information-dialog.c        |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libempathy-gtk/empathy-individual-information-dialog.c 
b/libempathy-gtk/empathy-individual-information-dialog.c
index 22bdb91..baa1e4c 100644
--- a/libempathy-gtk/empathy-individual-information-dialog.c
+++ b/libempathy-gtk/empathy-individual-information-dialog.c
@@ -371,7 +371,7 @@ start_gnome_contacts (FolksIndividual *individual,
   args = g_strdup_printf ("-i %s", folks_individual_get_id (individual));
 
   /* First try the old desktop name */
-  if (empathy_launch_external_app ("gnome-contacts.desktop", args, &error))
+  if (empathy_launch_external_app ("gnome-contacts.desktop", args, NULL))
     goto out;
 
   if (!empathy_launch_external_app ("org.gnome.Contacts.desktop", args, &error))