Fix bug 944 - "QIODevice.readData must use qmemcpy instead of qstrncpy"

Reviewer:  Luciano Wolf <luciano.wolf@openbossa.org>
           Marcelo Lira <marcelo.lira@openbossa.org>

tests/QtCore/bug_994.py

@@ -0,0 +1,20 @@
+import unittest
+from PySide.QtCore import *
+
+class MyIODevice (QIODevice):
+    def readData(self, amount):
+        return "\0a" * (amount/2)
+
+    def atEnd(self):
+        return False
+
+class TestBug944 (unittest.TestCase):
+
+    def testIt(self):
+        device = MyIODevice()
+        device.open(QIODevice.ReadOnly)
+        s = QTextStream(device)
+        self.assertEqual(s.read(4), "\0a\0a")
+
+if __name__ == "__main__":
+    unittest.main()