[PyQt] Crash QStringList on windows

[Alexandr N Zamaraev]

 >s = QtCore.QStringList(set(['1', '2', '3']))
This line crach python interpreter

But
 >s = QtCore.QStringList(list(set(['1', '2', '3'])))
work ok.

My Environment:
WinVista Home Basic Ru + sp1
Python 2.5.2
sip 4.7.7 (from source, build gcc mingw 3.4.5)
Qt 4.4.1 (from source, build gcc mingw 3.4.5)
PyQt 4.4.3 (from source, build gcc mingw 3.4.5)