Index: data.h
===================================================================
--- data.h	(revision 9010)
+++ data.h	(revision 9011)
@@ -119,4 +119,7 @@
  * returns NULL if layout is empty */
 pcb_box_t *pcb_data_bbox(pcb_box_t *out, pcb_data_t *Data);
 
+/* Make sure all layers of data has their .parent field pointing to the data */
+void pcb_data_set_layer_parents(pcb_data_t *data);
+
 #endif