Removing twice memory in meta-input-device-native.c
g_list_free_full (device->slow_keys_list, meta_input_device_native_free_pending_slow_key);
g_list_free (device->slow_keys_list);
g_list_free_full (device->slow_keys_list, meta_input_device_native_free_pending_slow_key);
g_list_free (device->slow_keys_list);