[vtkusers] crash on setinput

[David Brayford]

I am getting the following crash "Unhandled exception at 0x00000000 in
RegTest.exe: 0xC0000005: Access violation." when the SetInput function
is executed. However, the vtkImageData is not null (see code below). I
don't know how to overcome this error and any advice would be greatly
appreciated.

	if( !m_DataRepository->GetVtkDRR() )
	{
		return;	
	}

	vtkSmartPointer<vtkTexture> imageTexture=vtkTexture::New();
	imageTexture->SetInput( m_DataRepository->GetVtkDRR() );

David