ringdht: fix big parameter passed by value

Fix definition of RingAccount::createIceTransport
to pass by reference and not by value as ICE option
structure is not small (more than 200 bytes).

coverity CID #1369566

Change-Id: I41f17a266384e28e1cab9a17e17c8436f07a22d4
Tuleap: #909

src/ringdht/ringaccount.cpp

@@ -114,7 +114,7 @@ parseRingUri(const std::string& toUrl)
  */
 template <class... Args>
 std::shared_ptr<IceTransport>
-RingAccount::createIceTransport(Args... args)
+RingAccount::createIceTransport(const Args&... args)
 {
     // We need a public address in case of NAT'ed network
     // Trying to use one discovered by DHT service

src/ringdht/ringaccount.h

@@ -414,7 +414,7 @@ class RingAccount : public SIPAccountBase {
         pjsip_transport* via_tp_ {nullptr};
 
         template <class... Args>
-        std::shared_ptr<IceTransport> createIceTransport(Args... args);
+        std::shared_ptr<IceTransport> createIceTransport(const Args&... args);
 };
 
 } // namespace ring