Comment 2 for bug 917757

StacktraceTop:
 cheese_camera_set_device_by_dev_uuid (uuid=0xa3dd300 "", camera=0xa25ba40) at libcheese/cheese-camera.c:1455
 cheese_camera_setup (camera=0xa25ba40, uuid=0xa3dd300 "", error=0xbfd3672c) at libcheese/cheese-camera.c:1495
 cheese_main_window_setup_camera (self=0xa25e058, uri=0x0) at src/cheese-window.c:4177
 cheese_main_on_app_activate (self=0xa156908) at src/cheese-main.c:213
 g_cclosure_marshal_VOID__VOID (closure=0x9e6e3e8, return_value=0x0, n_param_values=1, param_values=0xa1c7a38, invocation_hint=0xbfd368c0, marshal_data=0x0) at /build/buildd/glib2.0-2.31.10/./gobject/gmarshal.c:85