fix: fix LOG call syntax (#301)

Related: #212

Author: richardeakin

src/internal/sio_client_impl.cpp

@@ -286,7 +286,7 @@ namespace sio
         if(ec || m_con.expired())
         {
             if (ec != asio::error::operation_aborted)
-                LOG("ping exit,con is expired?"<<m_con.expired()<<",ec:"<<ec.message()<<endl){};
+                LOG("ping exit,con is expired?"<<m_con.expired()<<",ec:"<<ec.message()<<endl);
             return;
         }
         packet p(packet::frame_ping);
@@ -500,7 +500,7 @@ namespace sio
             m_ping_timer.reset(new asio::steady_timer(m_client.get_io_service()));
             asio::error_code ec;
             m_ping_timer->expires_from_now(milliseconds(m_ping_interval), ec);
-            if(ec)LOG("ec:"<<ec.message()<<endl){};
+            if(ec)LOG("ec:"<<ec.message()<<endl);
             m_ping_timer->async_wait(std::bind(&client_impl::ping,this, std::placeholders::_1));
             LOG("On handshake,sid:"<<m_sid<<",ping interval:"<<m_ping_interval<<",ping timeout"<<m_ping_timeout<<endl);
             return;