Fix bug 1016 - "Calling of Q_INVOKABLE method returning not QVariant is impossible..."

tests/pysidetest/bug_1016.py

@@ -0,0 +1,12 @@
+from testbinding import *
+import unittest
+
+class TestBug1016 (unittest.TestCase):
+
+    def testIt(self):
+        obj = getHiddenObject()
+        self.assertEqual(obj.callMe(), None)
+        self.assertTrue(obj.wasCalled())
+
+if __name__ == "__main__":
+    unittest.main()