[rygel] external: Don't load the plugin more than once

[Zeeshan Ali Khattak <zeeshanak src gnome org>]

commit 0381607ee07fba51e194c62f7c1fd596c28fc8e6
Author: Zeeshan Ali (Khattak) <zeeshanak gnome org>
Date:   Wed Jun 24 01:52:28 2009 +0300

    external: Don't load the plugin more than once

 .../external/rygel-external-plugin-factory.vala    |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/plugins/external/rygel-external-plugin-factory.vala b/src/plugins/external/rygel-external-plugin-factory.vala
index e82272e..d1d7e5e 100644
--- a/src/plugins/external/rygel-external-plugin-factory.vala
+++ b/src/plugins/external/rygel-external-plugin-factory.vala
@@ -73,7 +73,8 @@ public class ExternalPluginFactory {
         }
 
         foreach (var service in services) {
-            if (service.has_prefix (SERVICE_PREFIX)) {
+            if (service.has_prefix (SERVICE_PREFIX) &&
+                this.loader.get_plugin_by_name (service) == null) {
                 this.loader.add_plugin (new ExternalPlugin (this.connection,
                                                             service));
             }