STYLE: vtkITKArchetypeImageSeriesReader: Fix -Wsign-compare warnings

/path/to/Projects/Slicer/Libs/vtkITK/vtkITKArchetypeImageSeriesReader.cxx: In member function ‘void vtkITKArchetypeImageSeriesReader::SetMetaDataScalarRangeToPointDataInfo(vtkImageData*)’:
/path/to/Projects/Slicer/Libs/vtkITK/vtkITKArchetypeImageSeriesReader.cxx:903:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
if (nbrOfComponents != this->MetaDataScalarRangeMinima.size() ||
^
/path/to/Projects/Slicer/Libs/vtkITK/vtkITKArchetypeImageSeriesReader.cxx:904:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
nbrOfComponents != this->MetaDataScalarRangeMaxima.size())
^
/path/to/Projects/Slicer/Libs/vtkITK/vtkITKArchetypeImageSeriesReader.cxx:923:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (unsigned int i = 0; i < nbrOfComponents; ++i)
^

git-svn-id: http://svn.slicer.org/Slicer4/trunk@26039 3bd1e089-480b-0410-8dfb-8563597acbee