[glib] GApplication: ignore --help if not handling args

[Ryan Lortie <desrt src gnome org>]

commit f4af8d1d007edcfa5949315be563b3aa8792f250
Author: Ryan Lortie <desrt desrt ca>
Date:   Sat Oct 4 12:47:33 2014 -0400

    GApplication: ignore --help if not handling args
    
    If the user didn't register any arguments for parsing, also ignore
    --help.  This fixes a regression in meld.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=737869

 gio/gapplication.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)
---
diff --git a/gio/gapplication.c b/gio/gapplication.c
index ebbc450..1fa1955 100644
--- a/gio/gapplication.c
+++ b/gio/gapplication.c
@@ -498,9 +498,15 @@ g_application_parse_command_line (GApplication   *application,
    * G_APPLICATION_HANDLES_COMMAND_LINE then we have to assume that
    * their primary instance commandline handler may want to deal with
    * the arguments.  We must therefore ignore them.
+   *
+   * We must also ignore --help in this case since some applications
+   * will try to handle this from the remote side.  See #737869.
    */
   if (application->priv->main_options == NULL && (application->priv->flags & 
G_APPLICATION_HANDLES_COMMAND_LINE))
-    g_option_context_set_ignore_unknown_options (context, TRUE);
+    {
+      g_option_context_set_ignore_unknown_options (context, TRUE);
+      g_option_context_set_help_enabled (context, FALSE);
+    }
 
   /* In the case that we are not explicitly marked as a service or a
    * launcher then we want to add the "--gapplication-service" option to