Clearly mark switch cases that fall through.

src/libcharon/sa/tasks/child_delete.c

@@ -163,6 +163,7 @@ static void process_payloads(private_child_delete_t *this, message_t *message)
 														   protocol, spi);
 							continue;
 						}
+						/* fall through */
 					case CHILD_INSTALLED:
 						if (!this->initiator)
 						{	/* reestablish installed children if required */

src/libfreeswan/pfkey_v2_parse.c

@@ -1247,6 +1247,7 @@ pfkey_msg_parse(struct sadb_msg *pfkey_msg,
 				  pfkey_msg->sadb_msg_type,
 				  pfkey_v2_sadb_type_string(pfkey_msg->sadb_msg_type));
 		}
+		/* fall through */
 	case SADB_ACQUIRE:
 	case SADB_REGISTER:
 	case SADB_EXPIRE:

src/starter/args.c

@@ -542,6 +542,7 @@ bool assign_arg(kw_token_t token, kw_token_t first, kw_list_t *kw, char *base,
 				}
 			}
 		}
+		/* fall through */
 	default:
 		return TRUE;
 	}

src/whack/whack.c

@@ -1155,6 +1155,7 @@ int main(int argc, char **argv)
 
 		case OPT_STATUSALL:     /* --statusall */
 			msg.whack_statusall = TRUE;
+			/* fall through */
 
 		case OPT_STATUS:        /* --status */
 			msg.whack_status = TRUE;