codegenerators: python: Turn QTextStream UTF-8 by default

Signed-off-by: Patrick José Pereira <patrickelectric@gmail.com>

umbrello/codegenerators/python/pythonwriter.cpp

@@ -205,6 +205,7 @@ void PythonWriter::writeClass(UMLClassifier *c)
         return;
     }
     QTextStream h(&fileh);
+    h.setCodec("UTF-8");
 
     //////////////////////////////
     //Start generating the code!!