Commit before switching to old master.

src/lammps.cpp

@@ -309,6 +309,7 @@ LAMMPS::LAMMPS(int narg, char **arg, MPI_Comm communicator)
       iarg += 3;
       while (iarg < narg && arg[iarg][0] != '-') iarg++;
 
+    } else error->universe_all(FLERR,"Invalid command-line argument");
   }
 
   // if no partition command-line switch, universe is one world with all procs