use std::map::emplace() instead of std::map::insert()

src/rpc/server.cpp

@@ -491,7 +491,7 @@ void RPCRunLater(const std::string& name, boost::function<void(void)> func, int6
         throw JSONRPCError(RPC_INTERNAL_ERROR, "No timer handler registered for RPC");
     deadlineTimers.erase(name);
     LogPrint("rpc", "queue run of timer %s in %i seconds (using %s)\n", name, nSeconds, timerInterface->Name());
-    deadlineTimers.insert(std::make_pair(name, std::unique_ptr<RPCTimerBase>(timerInterface->NewTimer(func, nSeconds*1000))));
+    deadlineTimers.emplace(name, std::unique_ptr<RPCTimerBase>(timerInterface->NewTimer(func, nSeconds*1000)));
 }
 
 CRPCTable tableRPC;