[pygobject] Fix GLib.Source sub-classing with initializer args

[Simon Feltman <sfeltman src gnome org>]

commit 59a2964141e963d2961e55d4b84a777927b4f21b
Author: Simon Feltman <sfeltman src gnome org>
Date:   Wed Sep 11 05:05:33 2013 -0700

    Fix GLib.Source sub-classing with initializer args
    
    Add variable args and keyword args to the GLib.Source.__new__
    method to support sub-classes which want to implement __init__.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=707904

 gi/overrides/GLib.py |    2 +-
 tests/test_source.py |   11 +++++++++++
 2 files changed, 12 insertions(+), 1 deletions(-)
---
diff --git a/gi/overrides/GLib.py b/gi/overrides/GLib.py
index 0a4cdb6..f4b1ef5 100644
--- a/gi/overrides/GLib.py
+++ b/gi/overrides/GLib.py
@@ -536,7 +536,7 @@ __all__.append('MainContext')
 
 
 class Source(GLib.Source):
-    def __new__(cls):
+    def __new__(cls, *args, **kwargs):
         # use our custom pyg_source_new() here as g_source_new() is not
         # bindable
         source = source_new()
diff --git a/tests/test_source.py b/tests/test_source.py
index 5b3b51b..d0e28e4 100644
--- a/tests/test_source.py
+++ b/tests/test_source.py
@@ -214,6 +214,17 @@ class TestSource(unittest.TestCase):
         del source
         self.assertTrue(self.finalized)
 
+    def test_extra_init_args(self):
+        class SourceWithInitArgs(GLib.Source):
+            def __init__(self, arg, kwarg=None):
+                super(SourceWithInitArgs, self).__init__()
+                self.arg = arg
+                self.kwarg = kwarg
+
+        source = SourceWithInitArgs(1, kwarg=2)
+        self.assertEqual(source.arg, 1)
+        self.assertEqual(source.kwarg, 2)
+
 
 class TestUserData(unittest.TestCase):
     def test_idle_no_data(self):