vtkParticleReader.cxx loss of precision on conversion
vtkParticleReader.cxx loss of precision on conversion

Changed code at starting at line 640. The issue is that vtkPoints
are float by default so there is a loss of precision in reading
in doubles and these being coverted to floats.

This is a fix for bug 0006866 here is the link:
  public.kitware.com/Bug/view.php?id=6866

amaclean is actually the person that reported the issue and provided
the bug fix is there a proper way to give credit when submitting a
bug?

gram526/VTK,jmerkow/VTK,msmolens/VTK,biddisco/VTK,ashray/VTK-EVM,mspark93/VTK,mspark93/VTK,msmolens/VTK,cjh1/VTK,gram526/VTK,SimVascular/VTK,SimVascular/VTK,mspark93/VTK,jmerkow/VTK,keithroe/vtkoptix,demarle/VTK,berendkleinhaneveld/VTK,sankhesh/VTK,johnkit/vtk-dev,cjh1/VTK,gram526/VTK,spthaolt/VTK,sankhesh/VTK,demarle/VTK,collects/VTK,keithroe/vtkoptix,spthaolt/VTK,ashray/VTK-EVM,cjh1/VTK,SimVascular/VTK,candy7393/VTK,ashray/VTK-EVM,johnkit/vtk-dev,sumedhasingla/VTK,sankhesh/VTK,demarle/VTK,jmerkow/VTK,mspark93/VTK,sumedhasingla/VTK,ashray/VTK-EVM,hendradarwin/VTK,candy7393/VTK,berendkleinhaneveld/VTK,biddisco/VTK,aashish24/VTK-old,sumedhasingla/VTK,daviddoria/PointGraphsPhase1,spthaolt/VTK,collects/VTK,daviddoria/PointGraphsPhase1,keithroe/vtkoptix,msmolens/VTK,hendradarwin/VTK,SimVascular/VTK,berendkleinhaneveld/VTK,collects/VTK,candy7393/VTK,hendradarwin/VTK,collects/VTK,johnkit/vtk-dev,hendradarwin/VTK,sankhesh/VTK,msmolens/VTK,spthaolt/VTK,ashray/VTK-EVM,keithroe/vtkoptix,gram526/VTK,mspark93/VTK,mspark93/VTK,msmolens/VTK,SimVascular/VTK,sumedhasingla/VTK,keithroe/vtkoptix,collects/VTK,berendkleinhaneveld/VTK,demarle/VTK,aashish24/VTK-old,biddisco/VTK,demarle/VTK,aashish24/VTK-old,sumedhasingla/VTK,candy7393/VTK,msmolens/VTK,SimVascular/VTK,daviddoria/PointGraphsPhase1,aashish24/VTK-old,mspark93/VTK,johnkit/vtk-dev,berendkleinhaneveld/VTK,candy7393/VTK,biddisco/VTK,berendkleinhaneveld/VTK,johnkit/vtk-dev,sankhesh/VTK,jmerkow/VTK,keithroe/vtkoptix,SimVascular/VTK,candy7393/VTK,sumedhasingla/VTK,sankhesh/VTK,daviddoria/PointGraphsPhase1,demarle/VTK,hendradarwin/VTK,cjh1/VTK,SimVascular/VTK,demarle/VTK,daviddoria/PointGraphsPhase1,jmerkow/VTK,gram526/VTK,daviddoria/PointGraphsPhase1,ashray/VTK-EVM,biddisco/VTK,johnkit/vtk-dev,cjh1/VTK,sumedhasingla/VTK,spthaolt/VTK,hendradarwin/VTK,msmolens/VTK,gram526/VTK,demarle/VTK,candy7393/VTK,keithroe/vtkoptix,sumedhasingla/VTK,hendradarwin/VTK,berendkleinhaneveld/VTK,jmerkow/VTK,johnkit/vtk-dev,biddisco/VTK,sankhesh/VTK,sankhesh/VTK,gram526/VTK,ashray/VTK-EVM,msmolens/VTK,cjh1/VTK,candy7393/VTK,biddisco/VTK,spthaolt/VTK,collects/VTK,ashray/VTK-EVM,keithroe/vtkoptix,gram526/VTK,spthaolt/VTK,mspark93/VTK,aashish24/VTK-old,jmerkow/VTK,jmerkow/VTK,aashish24/VTK-old