[vtkusers] vtkImageViewer2 patch

[Mathieu Malaterre]

Hi all,

	I would like to commit this patch for vtkImageViewer2:

http://www.creatis.insa-lyon.fr/~malaterre/vtk/iv2.patch

	When using vtkImageViewer2 user can press 'r' to *reset* the 
window/color level, but before *reseting* we should first set it. That's 
what I do in method 'SetInput'. It is particularly usefull with image 
with bad range value:

http://www.creatis.insa-lyon.fr/~malaterre/vtk/badrange.vtk

	Which you can just simply see it with this python script:

http://www.creatis.insa-lyon.fr/~malaterre/vtk/viewer.py


---

	Furthermore I also included the fix for Win32. I force the RenderWindow 
(in vtkRenderer) to be NULL before destroying it.

See here for more info:

http://vtk.org/pipermail/vtkusers/2003-October/020528.html

and more recently:

http://vtk.org/pipermail/vtkusers/2003-October/020619.html

Comments welcome
mathieu