Include concrete transport definitions for UP checks

src/chat/member_sync.c

@@ -6,6 +6,7 @@
 #include "chat_core.h"
 #include "chat_core_priv.h"
 #include "../utun_instance.h"
+#include "../transport_layer/etcp.h"
 #include "../../lib/debug_config.h"
 #include "../../lib/mem.h"