[file-roller] start the object path with a slash

[Paolo Bacchilega <paobac src gnome org>]

commit 11bab4aa2f791783e6beb2485d30c9b2970cdae4
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sat Dec 19 13:20:17 2015 +0100

    start the object path with a slash

 src/fr-application.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/fr-application.c b/src/fr-application.c
index b64d541..44c593b 100644
--- a/src/fr-application.c
+++ b/src/fr-application.c
@@ -131,7 +131,7 @@ window_progress_cb (FrWindow *window,
 
        g_dbus_connection_emit_signal (connection,
                                       NULL,
-                                      "org/gnome/ArchiveManager1",
+                                      "/org/gnome/ArchiveManager1",
                                       "org.gnome.ArchiveManager1",
                                       "Progress",
                                       g_variant_new ("(ds)",