Index: trunk/src/data_parent.h
===================================================================
--- trunk/src/data_parent.h	(revision 18339)
+++ trunk/src/data_parent.h	(revision 18340)
@@ -35,7 +35,8 @@
 	PCB_PARENT_LAYER,        /* object is on a layer */
 	PCB_PARENT_SUBC,         /* object is part of a subcircuit */
 	PCB_PARENT_DATA,         /* global objects like via */
-	PCB_PARENT_BOARD         /* directly under a board (typical for pcb_data_t of a board) */
+	PCB_PARENT_BOARD,        /* directly under a board (typical for pcb_data_t of a board) */
+	PCB_PARENT_UI            /* parent of UI layers */
 } pcb_parenttype_t;
 
 /* class is e.g. PCB_OBJ_CLASS_OBJ */
Index: trunk/src/layer_ui.c
===================================================================
--- trunk/src/layer_ui.c	(revision 18339)
+++ trunk/src/layer_ui.c	(revision 18340)
@@ -68,6 +68,8 @@
 	l->meta.real.color = pcb_strdup(color);
 	l->name = pcb_strdup(name);
 	l->meta.real.vis = 1;
+	l->parent_type = PCB_PARENT_UI;
+	l->parent.any = NULL;
 	pcb_event(PCB_EVENT_LAYERS_CHANGED, NULL);
 	return l;
 }
Index: trunk/src/obj_subc_parent.h
===================================================================
--- trunk/src/obj_subc_parent.h	(revision 18339)
+++ trunk/src/obj_subc_parent.h	(revision 18340)
@@ -89,6 +89,7 @@
 		switch(obj->parent_type) {
 			case PCB_PARENT_INVALID: return pcb_false;
 			case PCB_PARENT_BOARD:   return pcb_false;
+			case PCB_PARENT_UI:      return pcb_false; /* shouldn't happen */
 			case PCB_PARENT_LAYER:   if (obj->parent.layer->parent.data == data) return pcb_true; break;
 			case PCB_PARENT_SUBC:    if (obj->parent.subc->data == data) return pcb_true; break;
 			case PCB_PARENT_DATA:    if (obj->parent.data == data) return pcb_true; break;