players to not be saved when map saving is disabled (due to some error)

src/server.cpp

@@ -1395,6 +1395,8 @@ void Server::AsyncRunStep()
 
 			JMutexAutoLock lock(m_env_mutex);
 
+			if(((ServerMap*)(&m_env.getMap()))->isSavingEnabled() == true)
+			{
 				// Save only changed parts
 				m_env.getMap().save(true);
 
@@ -1411,6 +1413,7 @@ void Server::AsyncRunStep()
 				m_env.serializePlayers(m_mapsavedir);
 			}
 		}
+	}
 }
 
 void Server::Receive()