in case an out of sequence snapshot at the final time is produced, make sure...

in case an out of sequence snapshot at the final time is produced, make sure that also the group finder is run if enabled

src/main/run.cc

@@ -172,11 +172,11 @@ void sim::run(void)
         {
           mpi_printf("\nFinal time=%g reached. Simulation ends.\n", All.TimeMax);
 
-          if(All.Ti_lastoutput != All.Ti_Current) /* make a snapshot at the final time in case none has been produced at this time */
+          /* make a snapshot at the final time in case none has been produced at this time yet */
+          if(All.Ti_lastoutput != All.Ti_Current)
             {
-              snap_io Snap(&Sp, Communicator, All.SnapFormat); /* get an I/O object */
-              /* this snapshot will be overwritten if All.TimeMax is increased and the run is continued */
-              Snap.write_snapshot(All.SnapshotFileCount++, NORMAL_SNAPSHOT);
+              All.Ti_nextoutput = All.Ti_Current;
+              create_snapshot_if_desired();
             }
 
           break;