[vtkusers] VTK-4.4 Histogram.Tcl Example and missing method

[Rocky Rhodes]

I just downloaded and built the 4.4 release and tried running the example
Histogram.tcl from the Examples/ImageProcessing/Tcl directory.  I get an
error complaining that the method "GetScalarComponentAsFloat" could not be
found.  I confirmed that there was such a method in the vtkImageData.cxx
file in the Common subdirectory in the 4.2 release, but this file does not
contain this method in the 4.4 version of the code.

The latest version of the Common directory doesn't contain this file.

I'm wondering what my best option is at this point.  I wanted to use
something newer than 4.2, because I was looking for a release with support
for the MetaImage file format, but would rather use a stable release than a
nightly build.  The Histogram example was close to one little bit of
functionality I I wanted to play with, so I started my investigation there.

Thanks for the help.

	Rocky