TaskDialog infinite loop on an error case

We are using an CXTPTaskDialog in our application.

I'm using incorrect settings and the dialog fails to create.
In this case the application ends up in an infinite loop.

The culprit seems to be the handling of the error case in 

int CXTPTaskDialogFrame::OnCreate(LPCREATESTRUCT lpCreateStruct)
{
  ...
  	if (!CreateClient(TRUE))
	{
		TRACE0("Failed to create Task Dialog UI window.\n");
		return FALSE;
	}

}

The return FALSE seems to be incorrect (the method returns 0 as success).

If I patch the code with a return -1 when CreateClient() fails, the infinite loop no longer happens.