changed the exit procedure so destructors can be called

src/main.cpp

@@ -13,10 +13,12 @@
 int x = 0;
 int y = 0;
 
+bool b_quit = false;
+
 void sigint_handler(int param)
 {
+	b_quit = true;
 	std::cout << "Exiting..." << std::endl;
-	exit(1);
 }
 
 int main()
@@ -30,7 +32,7 @@ int main()
 
 	zmq::message_t msg_recv;
 	zmq::message_t msg_send;
-	for (;;)
+	while (!b_quit)
 	{
 		int32_t x = 0;
 		int32_t y = 0;