Merge topic 'fix_leaks_in_vtkOBJExporter'

e3be504b Prevent memory leaks in vtkOBJExporter

Acked-by: Kitware Robot <kwrobot@kitware.com>
Acked-by: Mathieu Westphal <mathieu.westphal@kitware.com>
Acked-by: Julien Finet <julien.finet@kitware.com>
Acked-by: Bill Lorensen <bill.lorensen@gmail.com>
Merge-request: !2623