Clean up switch cases: proper fall through comments, no break after

return.

src/lib/commands/mfir.c

@@ -601,6 +601,7 @@ multifire(void)
 	    break;
 	case targ_ship:
 	    nreport(player->cnum, N_SHP_SHELL, vict, 1);
+	    /* fall through */
 	default:
 	    if ((target != targ_sub) ||
 		((vship.shp_rflags & RET_DCHRGED) == 0))

src/lib/commands/retr.c

@@ -113,6 +113,7 @@ retr(void)
 		break;
 	    default:
 		pr("bad condition\n");
+		/* fall through */
 	    case '?':
 		pr("i\tretreat when injured\n");
 		pr("t\tretreat when torped\n");
@@ -245,6 +246,7 @@ lretr(void)
 		break;
 	    default:
 		pr("bad condition\n");
+		/* fall through */
 	    case '?':
 		pr("i\tretreat when injured\n");
 		pr("h\tretreat when helpless\n");

src/lib/subs/mission.c

@@ -849,10 +849,8 @@ nameofitem(s_char *buf, struct genitem *gp, int type)
     switch (type) {
     case EF_SHIP:
 	return prship((struct shpstr *)gp);
-	break;
     case EF_PLANE:
 	return prplane((struct plnstr *)gp);
-	break;
     case EF_LAND:
 	return prland((struct lndstr *)gp);
     }