Fix bug #164 - __len__() function missing in QItemSelection.

Reviewed by Renato Araujo <renato.filho@openbossa.org>
Reviewed by Hugo Parente <hugo.lima@openbossa.org>
Reviewed by Lauro Moura <lauro.neto@openbossa.org>

tests/qtgui/qitemselection_test.py

@@ -0,0 +1,18 @@
+import unittest
+
+from helper import UsesQApplication
+from PySide.QtGui import QItemSelection, QStandardItemModel
+
+class QItemSelectionTest(UsesQApplication):
+    def testLen(self):
+        model = QStandardItemModel(2, 2)
+        model.insertRow(0)
+        model.insertRow(1)
+        model.insertColumn(0)
+        model.insertColumn(1)
+        selection = QItemSelection(model.index(0,0), model.index(1,1))
+        self.assertEqual(len(selection), 1)
+
+if __name__ == '__main__':
+    unittest.main()
+