vtkOpenGLImageActor hangs if image is empty.
This issue was created automatically from an original Mantis Issue. Further discussion may take place here.
When an empty image is passed to the vtkOpenGLImageActor, the MakeDataSuitable method can enter an infinite loop, and hang.
The problem only occurs when the image returns it's extents as [0, -1, 0, -1, 0, -1]. In this case, the xsize is inferred to be -1, and the loop to find the next power of 2 falls into an infinite loop.