[gnome-builder] G-I: add () around in_signature for GDBus

[Christian Hergert <chergert src gnome org>]

commit 814973c0ea357a30d0e767d6692b9a5e5b34c037
Author: Christian Hergert <chergert redhat com>
Date:   Thu Oct 29 23:51:32 2015 -0700

    G-I: add () around in_signature for GDBus
    
    Might not be the best idea long term, but convenient for now.

 src/Builder.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/Builder.py b/src/Builder.py
index 6485e63..a2778d8 100644
--- a/src/Builder.py
+++ b/src/Builder.py
@@ -51,7 +51,7 @@ def DBusMethod(dbus_interface, in_signature=None, out_signature=None, async=Fals
         func._dbus_method.out_signature = out_signature or ''
 
         func._dbus_method.in_args = []
-        in_signature_list = GLib.Variant.split_signature(in_signature)
+        in_signature_list = GLib.Variant.split_signature('('+in_signature+')')
         arg_names = inspect.getargspec(func).args
         arg_names.pop(0) # eat "self" argument
         if async: arg_names.pop(0) # eat "invocation"