[gnome-packagekit] Return with success if we try to install no packages

[Richard Hughes <rhughes src gnome org>]

commit fead6ce3fb4d8e71847ec5373450373fe8c28779
Author: Richard Hughes <richard hughsie com>
Date:   Fri Mar 23 10:16:33 2012 +0000

    Return with success if we try to install no packages
    
    Release Team Approval: Andre Klapper <ak-47 gmx net>
    Release Team Approval: Javier JardÃn <jjardon gnome org>

 src/gpk-dbus-task.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/gpk-dbus-task.c b/src/gpk-dbus-task.c
index 2f3a6ed..065c213 100644
--- a/src/gpk-dbus-task.c
+++ b/src/gpk-dbus-task.c
@@ -1221,6 +1221,10 @@ gpk_dbus_task_install_package_names (GpkDbusTask *dtask, gchar **packages, GpkDb
 
 	string = g_string_new ("");
 	len = g_strv_length (packages);
+	if (len == 0) {
+		gpk_dbus_task_dbus_return_value (dtask, TRUE);
+		goto out;
+	}
 
 	/* don't use a bullet for one item */
 	if (len == 1) {