Debugged the ib markers not being written with file_per_process

Author: danieljvickers

src/simulation/m_data_output.fpp

@@ -753,6 +753,10 @@ contains
             end if
 
             call MPI_FILE_CLOSE(ifile, ierr)
+
+            if (ib) then
+                call s_write_parallel_ib_data(t_step)
+            end if
         else
             if (ib) then
                 call s_initialize_mpi_data(q_cons_vf, ib_markers)