fix so failed accept doesn't terminate the server

Signed-off-by: Kent Gustavsson <kent@minoris.se>

library/RemoteServer.cpp

@@ -476,12 +476,15 @@ void ServerMainImpl::threadFn(std::promise<bool> promise, int port)
     CActiveSocket *client = nullptr;
 
     try {
-        while ((client = server.socket.Accept()) != NULL)
+        while (server.socket.IsSocketValid())
+        {
+            if ((client = server.socket.Accept()) != NULL)
             {
                 BlockGuard lock;
                 ServerConnection::Accepted(client);
                 client = nullptr;
             }
+        }
     } catch(BlockedException &) {
         if (client)
             client->Close();