src: set port in node_options to uint16_t

Author: anonrig

src/node_options.h

@@ -28,12 +28,11 @@ class HostPort {
 
   void set_host(const std::string& host) { host_name_ = host; }
 
-  void set_port(int port) { port_ = port; }
+  void set_port(uint16_t port) { port_ = port; }
 
   const std::string& host() const { return host_name_; }
 
-  int port() const {
-    // TODO(joyeecheung): make port a uint16_t
+  uint16_t port() const {
     CHECK_GE(port_, 0);
     return port_;
   }
@@ -45,7 +44,7 @@ class HostPort {
 
  private:
   std::string host_name_;
-  int port_;
+  uint16_t port_;
 };
 
 class Options {