message: Re-add long voxel index which got eaten by a merge for some reason.
diff: @@ -58,6 +58,7 @@ typedef std::pair<BlockIndex, VoxelIndex> VoxelKey;
  typedef AlignedVector<AnyIndex> IndexVector;
  typedef IndexVector BlockIndexList;
  typedef IndexVector VoxelIndexList;
  +typedef AlignedVector<LongIndex> LongIndexVector;
  struct Color;
  typedef uint32_t Label;
  