[gnome-packagekit] Fix crash in gpk-dbus-service when looking for printer drivers

[Vincent Untz <vuntz src gnome org>]

commit ae0bcc54944bb66634fe1bcf442e0f27ef142e99
Author: Vincent Untz <vuntz gnome org>
Date:   Thu Jun 17 16:24:08 2010 +0200

    Fix crash in gpk-dbus-service when looking for printer drivers
    
    We were creating a gchar ** variable that is supposed to end with NULL,
    except that we forgot to add a NULL at the end.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=621892

 src/gpk-dbus-task.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/gpk-dbus-task.c b/src/gpk-dbus-task.c
index 8ba346f..29ac679 100644
--- a/src/gpk-dbus-task.c
+++ b/src/gpk-dbus-task.c
@@ -2622,7 +2622,8 @@ gpk_dbus_task_install_printer_drivers (GpkDbusTask *dtask, gchar **device_ids, G
 		goto out;
 	}
 
-	tags = g_renew (gchar *, tags, n_tags);
+	tags = g_renew (gchar *, tags, n_tags + 1);
+	tags[n_tags] = NULL;
 
 	/* get driver packages */
 	pk_client_what_provides_async (PK_CLIENT(dtask->priv->task),