Memory leaks using QStringToBSTR inproperly

There are several calls to functions that expect parameters as a pointer to OLESTR. qaxserverbase.cpp code (at least qaxserverbase.cpp, maybe there are other ones) utilizes such calls as follows (this is one example):

hr = m_spInPlaceFrame->SetActiveObject(this, QStringToBSTR(class_name));

Here QStringToBSTR is called, which allocates memory, which in turn never gets freed. But, actually, such functions expect LPCOLESTR:

virtual HRESULT STDMETHODCALLTYPE SetActiveObject(
/* [unique][in] */ _RPC_in_opt IOleInPlaceActiveObject *pActiveObject,
/* [unique][string][in] */ _RPC_in_opt_string LPCOLESTR pszObjName) = 0;

OLESTR is not a BSTR, this is just WCHAR (WTypes.h from Win SDK):

#define OLESTR(str) L##str

So no allocations (call of QStringToBSTR) are needed, and therefore no leaks will occur.