Index: trunk/src/draw.h
===================================================================
--- trunk/src/draw.h	(revision 20464)
+++ trunk/src/draw.h	(revision 20465)
@@ -62,7 +62,7 @@
 			int is_current;
 			pcb_pstk_draw_hole_t holetype;
 			pcb_layer_combining_t comb;
-			pcb_layer_t *layer1; /* first (real) layer in the target group */
+			const pcb_layer_t *layer1; /* first (real) layer in the target group */
 
 			pcb_layer_type_t shape_mask; /* when gid is invalid, use this for the shapes */
 		} pstk;
Index: trunk/src/obj_pstk.c
===================================================================
--- trunk/src/obj_pstk.c	(revision 20464)
+++ trunk/src/obj_pstk.c	(revision 20465)
@@ -319,7 +319,7 @@
 
 /*** draw ***/
 
-static void set_ps_color(pcb_pstk_t *ps, int is_current, pcb_layer_type_t lyt, pcb_layer_t *ly1)
+static void set_ps_color(pcb_pstk_t *ps, int is_current, pcb_layer_type_t lyt, const pcb_layer_t *ly1)
 {
 	const char *color, *layer_color = NULL;
 	char buf[sizeof("#XXXXXX")];