Fix crash when saving session with open files

diff --git a/pv/mainwindow.cpp b/pv/mainwindow.cpp
index 45d805a8d6f87f2c08eb649cbdf930c70dca48df..77dc946213ef20850247fc0b5acf15f51b820df3 100644 (file)
--- a/pv/mainwindow.cpp
+++ b/pv/mainwindow.cpp
@@ -273,7 +273,8 @@ void MainWindow::save_ui_settings()
                                dynamic_pointer_cast< devices::HardwareDevice >
                                (session->device());
 
-                       if (device->hardware_device()->driver()->name() == "demo")
+                       if (device &&
+                               device->hardware_device()->driver()->name() == "demo")
                                continue;
                }