Fixed unintentional fall-through in task_manager.

Reported by Howard Windsor.

src/libcharon/sa/task_manager.c

@@ -406,6 +406,7 @@ METHOD(task_manager_t, initiate, status_t,
 					break;
 				case IKE_MOBIKE:
 					exchange = INFORMATIONAL;
+					break;
 				default:
 					continue;
 			}