Index: layer_grp.c
===================================================================
--- layer_grp.c	(revision 26805)
+++ layer_grp.c	(revision 26806)
@@ -45,7 +45,7 @@
 	if (!inhibit_notify) { \
 		pcb_event(&pcb->hidlib, PCB_EVENT_LAYERS_CHANGED, NULL); \
 		if ((pcb_gui != NULL) && (pcb_exporter == NULL)) \
-			pcb_gui->invalidate_all(pcb_gui, &pcb->hidlib); \
+			pcb_gui->invalidate_all(pcb_gui); \
 		pcb_board_set_changed_flag(pcb_true); \
 	} \
 } while(0)