output particles without rhs

cpp/full_code/test_tracer_set.cpp

@@ -107,13 +107,13 @@ int test_tracer_set<rnumber>::do_work(void)
                 MPI_COMM_WORLD,
                 "tracers0",
                 pset.getTotalNumberOfParticles(),
-                1);
+                0);
     particles_output_writer_mpi->setParticleFileLayout(bla.getParticleFileLayout());
 
     fti->set_field(vec_field);
     trhs->setVelocity(fti);
 
-    particle_solver psolver(pset, 1);
+    particle_solver psolver(pset, 0);
 
     psolver.Euler(0.001, *trhs);
     psolver.setIteration(1);