Wrap proxy member var declarations in #ifdef

HttpClient.cpp

@@ -29,7 +29,7 @@ HttpClient::HttpClient(Client& aClient, const char* aProxy, uint16_t aProxyPort)
 }
 #else
 HttpClient::HttpClient(Client& aClient)
- : iClient(&aClient), iProxyPort(0)
+ : iClient(&aClient)
 {
   resetState();
 }

HttpClient.h

@@ -440,9 +440,11 @@ protected:
     int iBodyLengthConsumed;
     // How far through a Content-Length header prefix we are
     const char* iContentLengthPtr;
+#ifdef PROXY_ENABLED
     // Address of the proxy to use, if we're using one
     IPAddress iProxyAddress;
     uint16_t iProxyPort;
+#endif
     uint32_t iHttpResponseTimeout;
 };