fixed race condtion #350

Transports.cpp

@@ -69,21 +69,21 @@ namespace transport
 
 	std::shared_ptr<i2p::crypto::DHKeys> DHKeysPairSupplier::Acquire ()
 	{
-		if (!m_Queue.empty ())
 		{
 			std::unique_lock<std::mutex>  l(m_AcquiredMutex);
+			if (!m_Queue.empty ())
+			{
 				auto pair = m_Queue.front ();
 				m_Queue.pop ();
 				m_Acquired.notify_one ();
 				return pair;
 			}	
-		else // queue is empty, create new
+		}	
-		{	
+		// queue is empty, create new
 		auto pair = std::make_shared<i2p::crypto::DHKeys> ();
 		pair->GenerateKeys ();
 		return pair;
 	}
-	}
 
 	void DHKeysPairSupplier::Return (std::shared_ptr<i2p::crypto::DHKeys> pair)
 	{