Fix bug 920 - "Cannot use same slot for two signals"

Reviewer: Luciano Wolf <luciano.wolf@openbossa.org>
          Renato Araújo <renato.filho@openbossa.org>

tests/QtCore/bug_920.py

@@ -0,0 +1,25 @@
+#!/usr/bin/env python
+
+import sys
+import unittest
+import PySide.QtCore as QtCore
+
+class Signaller(QtCore.QObject):
+    s1 = QtCore.Signal()
+    s2 = QtCore.Signal()
+
+class TestBug920(unittest.TestCase):
+
+    def testIt(self):
+        s = Signaller()
+        s.s1.connect(self.onSignal)
+        s.s2.connect(self.onSignal)
+        self.assertTrue(s.s1.disconnect(self.onSignal))
+        self.assertTrue(s.s2.disconnect(self.onSignal))
+
+    def onSignal(self):
+        pass
+
+
+if __name__ == "__main__":
+    unittest.main()