[epiphany] Fix "Non-void function should return a value"

[Ting-Wei Lan <lantw src gnome org>]

commit 03b9ca0c22ad6754104d363f754272e66fb8a2df
Author: Ting-Wei Lan <lantw src gnome org>
Date:   Wed Aug 27 01:17:46 2014 +0800

    Fix "Non-void function should return a value"

 embed/web-extension/ephy-web-extension.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/embed/web-extension/ephy-web-extension.c b/embed/web-extension/ephy-web-extension.c
index 44ca976..110416d 100644
--- a/embed/web-extension/ephy-web-extension.c
+++ b/embed/web-extension/ephy-web-extension.c
@@ -1269,7 +1269,7 @@ allow_tls_certificate_cb (JSContextRef context,
   extension = data->extension;
 
   if (!extension->priv->dbus_connection)
-    return;
+    return JSValueMakeUndefined (context);
 
   g_dbus_connection_emit_signal (extension->priv->dbus_connection,
                                  NULL,