BUG: unguarded use of globalIndex in vtk writers (fixes #1110)

- the problem occurred when running the writers in a parallel solver
  or utility but requesting output on the master only.

  Adjusted the logic to avoid globalIndex for these cases.
  Previously the if (parallel_) checks were happening later, after the
  globalIndex had already been created.

src/fileFormats/vtk/file/foamVtkFileWriter.C

@@ -24,7 +24,6 @@ License
 \*---------------------------------------------------------------------------*/
 
 #include "foamVtkFileWriter.H"
-#include "globalIndex.H"
 #include "OSspecific.H"
 
 // * * * * * * * * * * * * * * Static Data Members * * * * * * * * * * * * * //