Fix socket.hpp build

typon/include/python/socket.hpp

@@ -7,6 +7,7 @@
 
 #include "builtins.hpp"
 #include <netinet/in.h>
+#include <netdb.h>
 #include <tuple>
 
 namespace py_socket {
@@ -99,7 +100,9 @@ struct socket_t {
     hints.ai_protocol = proto;
     hints.ai_flags = flags;
     addrinfo *res;
-    if (int err = ::getaddrinfo(host.c_str(), port.c_str(), &hints, &res); err != 0) {
+    // convert port to string
+    std::string port_str = std::to_string(port);
+    if (int err = ::getaddrinfo(host.c_str(), port_str.c_str(), &hints, &res); err != 0) {
       system_error(err, "getaddrinfo()");
     }
     return res;