upnp: fix constructor

Change-Id: I6c8082c7452c371d3c1afc03846452cf0d547e20

include/upnp/upnp_context.h

@@ -105,7 +105,7 @@ private:
     };
 
 public:
-    UPnPContext(std::shared_ptr<asio::io_context> ctx, std::shared_ptr<dht::log::Logger> logger);
+    UPnPContext(const std::shared_ptr<asio::io_context>& ctx, const std::shared_ptr<dht::log::Logger>& logger);
     ~UPnPContext();
 
     // Retrieve the UPnPContext singleton.

src/upnp/upnp_context.cpp

@@ -36,7 +36,7 @@ constexpr static uint16_t UPNP_TCP_PORT_MAX {UPNP_TCP_PORT_MIN + 5000};
 constexpr static uint16_t UPNP_UDP_PORT_MIN {20000};
 constexpr static uint16_t UPNP_UDP_PORT_MAX {UPNP_UDP_PORT_MIN + 5000};
 
-UPnPContext::UPnPContext(std::shared_ptr<asio::io_context> ctx, std::shared_ptr<dht::log::Logger> logger)
+UPnPContext::UPnPContext(const std::shared_ptr<asio::io_context>& ioContext, const std::shared_ptr<dht::log::Logger>& logger)
  : mappingListUpdateTimer_(*ioContext)
 {
     // JAMI_DBG("Creating UPnPContext instance [%p]", this);