Fixing compile errors without MPI

tests/lbpm_segmented_decomp.cpp

@@ -18,7 +18,7 @@
 int main(int argc, char **argv)
 {
 	// Initialize MPI
-	MPI_Init(&argc,&argv);
+	Utilities::startup( argc, argv );
 	Utilities::MPI comm( MPI_COMM_WORLD );
     int rank = comm.getRank();
     int nprocs = comm.getSize();
@@ -365,5 +365,5 @@ int main(int argc, char **argv)
 		}
 	}
 	comm.barrier();
-	MPI_Finalize();
+	Utilities::shutdown();
 }