Implement Assertion properly, TID printing in debug builds

include/Client.hpp

@@ -10,6 +10,7 @@
 #define SOCKET int
 #endif
 #include "Buffer.h"
+#include "Assert.h"
 #include <string>
 #include <vector>
 #include <chrono>
@@ -65,6 +66,7 @@ struct ClientInterface{
         c = nullptr;
     }
     void AddClient(Client *c){
+        Assert(c);
         Clients.insert(c);
     }
     int Size(){