Fix compilation with VTK 7.1
This fixes #49 (closed).
The problem was just a missing vtk library dependency. It is likely that this compiled in earlier versions of vtk because one of the other libraries we use also depended on it.
This fixes #49 (closed).
The problem was just a missing vtk library dependency. It is likely that this compiled in earlier versions of vtk because one of the other libraries we use also depended on it.