Fix gcc warnings.

include/ascs/socket.h

@@ -335,7 +335,7 @@ private:
 		if (dispatching)
 			return;
 
-		if (dispatching = !last_dispatch_msg.empty() || recv_msg_buffer.try_dequeue(last_dispatch_msg))
+		if ((dispatching = !last_dispatch_msg.empty() || recv_msg_buffer.try_dequeue(last_dispatch_msg)))
 		{
 			auto begin_time = statistic::now();
 			stat.dispatch_dealy_sum += begin_time - last_dispatch_msg.begin_time;

include/ascs/tcp/socket.h

@@ -250,7 +250,7 @@ private:
 			}
 		}
 
-		if (this->sending = !bufs.empty())
+		if ((this->sending = !bufs.empty()))
 		{
 			last_send_msg.front().restart();
 			asio::async_write(this->next_layer(), bufs, this->make_strand(

include/ascs/udp/socket.h

@@ -185,7 +185,7 @@ private:
 		if (!in_strand && this->sending)
 			return true;
 
-		if (this->sending = this->send_msg_buffer.try_dequeue(last_send_msg))
+		if ((this->sending = this->send_msg_buffer.try_dequeue(last_send_msg)))
 		{
 			this->stat.send_delay_sum += statistic::now() - last_send_msg.begin_time;