Fix compilation of C++-library with Qt 4.

TypeOfExpression.cpp:64:20: error: ‘class QSharedPointer<CPlusPlus::CreateBindings>’ has no member named ‘reset’

Change-Id: Ifee13f58dd7e740241231019bbbbeb38ccfbe3d9
Reviewed-by: Eike Ziller <eike.ziller@digia.com>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>