[pygobject] pygi-value: special case for NULL GValueArray

[Simon Feltman <sfeltman src gnome org>]

commit f27b1976ea325fcd55359888401dd08ac8fb074a
Author: Mikhail Fludkov <misha pexip com>
Date:   Tue Sep 1 17:54:17 2015 +0200

    pygi-value: special case for NULL GValueArray
    
    Don't segfault when dealing with GValue of GValueArray type containing
    NULL. Return empty list in this case.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=754359

 gi/pygi-value.c       |    5 +++--
 tests/test_gobject.py |    6 ++++++
 2 files changed, 9 insertions(+), 2 deletions(-)
---
diff --git a/gi/pygi-value.c b/gi/pygi-value.c
index 2cf567d..3bdd854 100644
--- a/gi/pygi-value.c
+++ b/gi/pygi-value.c
@@ -775,9 +775,10 @@ pygi_value_to_py_structured_type (const GValue *value, GType fundamental, gboole
             return pyg_value_as_pyobject(n_value, copy_boxed);
         } else if (holds_value_array) {
             GValueArray *array = (GValueArray *) g_value_get_boxed(value);
-            PyObject *ret = PyList_New(array->n_values);
+            Py_ssize_t n_values = array ? array->n_values : 0;
+            PyObject *ret = PyList_New(n_values);
             int i;
-            for (i = 0; i < array->n_values; ++i)
+            for (i = 0; i < n_values; ++i)
                 PyList_SET_ITEM(ret, i, pyg_value_as_pyobject
                         (array->values + i, copy_boxed));
             return ret;
diff --git a/tests/test_gobject.py b/tests/test_gobject.py
index 6c15e20..87b0e4c 100644
--- a/tests/test_gobject.py
+++ b/tests/test_gobject.py
@@ -669,5 +669,11 @@ class TestGValue(unittest.TestCase):
         value = GObject.Value(GObject.TYPE_OBJECT, obj)
         self.assertEqual(value.get_value(), obj)
 
+    def test_value_array(self):
+        value = GObject.Value(GObject.ValueArray)
+        self.assertEqual(value.g_type, GObject.type_from_name('GValueArray'))
+        value.set_value([32, 'foo_bar', 0.3])
+        self.assertEqual(value.get_value(), [32, 'foo_bar', 0.3])
+
 if __name__ == '__main__':
     unittest.main()