Merge topic 'variant-review'

1c395c74 Fixed out of bounds array access with empty arrays
aea8f0a2 Folded vtkVariantToNumeric.inl into the .cxx file
4d380c86 Code review of vtkVariant and vtkScalarsToColors

Acked-by: Kitware Robot <kwrobot@kitware.com>
Tested-by: buildbot <buildbot@kitware.com>
Reviewed-by: David Gobbi <david.gobbi@gmail.com>
Merge-request: !10325