message: BUGFIX: fix typo in ParticleMesh::initialize()
  Fixed typo in initialize(). The code was allocating memory
  for cell-centered fields when the intent was to allocate
  memory for node-centered fields.
diff: @@ -111,8 +111,8 @@ void ParticleMesh::initialize( )
  {
  SLIC_ASSERT( m_positions != AXOM_NULLPTR );
  - m_mesh_fields[ CELL_CENTERED ]->reserve( getNodeCapacity() );
  - m_mesh_fields[ CELL_CENTERED ]->resize( getNumberOfNodes() );
  + m_mesh_fields[ NODE_CENTERED ]->reserve( getNodeCapacity() );
  + m_mesh_fields[ NODE_CENTERED ]->resize( getNumberOfNodes() );
  m_explicit_coords = true;
  m_explicit_connectivity = false;
  m_has_mixed_topology = false;
  