Index: layer.h
===================================================================
--- layer.h	(revision 29668)
+++ layer.h	(revision 29669)
@@ -199,7 +199,7 @@
 #define PCB_CURRLID(pcb)         (pcb_layer_stack[0])
 
 /* Free all metadata and objects of a layer; does not free(layer) */
-void pcb_layer_free_fields(pcb_layer_t *layer);
+void pcb_layer_free_fields(pcb_layer_t *layer, pcb_bool undoable);
 
 /* Return the layer pointer (or NULL on invalid or virtual layers) for an id */
 pcb_layer_t *pcb_get_layer(pcb_data_t *data, pcb_layer_id_t id);