Index: layer.h
===================================================================
--- layer.h	(revision 29694)
+++ layer.h	(revision 29695)
@@ -274,7 +274,7 @@
 void pcb_layers_reset(pcb_board_t *pcb);
 
 /* Create a new layer and put it in an existing group (if grp is not -1). */
-pcb_layer_id_t pcb_layer_create(pcb_board_t *pcb, pcb_layergrp_id_t grp, const char *lname);
+pcb_layer_id_t pcb_layer_create(pcb_board_t *pcb, pcb_layergrp_id_t grp, const char *lname, pcb_bool undoable);
 
 /* Return the name of a layer (resolving the true name of virtual layers too) */
 const char *pcb_layer_name(pcb_data_t *data, pcb_layer_id_t id);