Index: trunk/src/draw.c
===================================================================
--- trunk/src/draw.c	(revision 19398)
+++ trunk/src/draw.c	(revision 19399)
@@ -619,7 +619,7 @@
 	info->xform = NULL;
 }
 
-void pcb_draw_layer_noxform(const pcb_board_t *pcb, const pcb_layer_t *Layer, const pcb_box_t *screen)
+void pcb_draw_layer_noxform(pcb_board_t *pcb, const pcb_layer_t *Layer, const pcb_box_t *screen)
 {
 	pcb_draw_info_t info;
 	pcb_box_t scr2;
@@ -644,7 +644,7 @@
 
 /* This version is about 1% slower and used rarely, thus it's all dupped
    from pcb_draw_layer() to keep the original speed there */
-void pcb_draw_layer_under(const pcb_board_t *pcb, const pcb_layer_t *Layer, const pcb_box_t *screen, pcb_data_t *data)
+void pcb_draw_layer_under(pcb_board_t *pcb, const pcb_layer_t *Layer, const pcb_box_t *screen, pcb_data_t *data)
 {
 	pcb_draw_info_t info;
 	pcb_box_t scr2;
Index: trunk/src/draw.h
===================================================================
--- trunk/src/draw.h	(revision 19398)
+++ trunk/src/draw.h	(revision 19399)
@@ -49,7 +49,7 @@
 
 /* Some low level draw callback depend on this in their void *cl */
 typedef struct pcb_draw_info_s {
-	const pcb_board_t *pcb;
+	pcb_board_t *pcb;
 	const pcb_box_t *drawn_area;
 	const pcb_xform_t *xform_caller;       /* the extra transformation the caller requested */
 	pcb_xform_t *xform;                    /* the final transformation applied on objects */
@@ -118,12 +118,12 @@
 void pcb_redraw(void);
 void pcb_draw_obj(pcb_any_obj_t *obj);
 void pcb_draw_layer(pcb_draw_info_t *info, const pcb_layer_t *ly);
-void pcb_draw_layer_noxform(const pcb_board_t *pcb, const pcb_layer_t *ly, const pcb_box_t *screen);
+void pcb_draw_layer_noxform(pcb_board_t *pcb, const pcb_layer_t *ly, const pcb_box_t *screen);
 
 /* Same as pcb_draw_layer(), but never draws an implicit outline and ignores
    objects that are not in the subtree of data - useful for drawing a subtree,
    e.g. a subc only */
-void pcb_draw_layer_under(const pcb_board_t *pcb, const pcb_layer_t *Layer, const pcb_box_t *screen, pcb_data_t *data);
+void pcb_draw_layer_under(pcb_board_t *pcb, const pcb_layer_t *Layer, const pcb_box_t *screen, pcb_data_t *data);
 
 /* Composite draw all layer groups matching lyt/purpi/purpose */
 void pcb_draw_groups(pcb_board_t *pcb, pcb_layer_type_t lyt, int purpi, char *purpose, const pcb_box_t *screen, const char *default_color, pcb_layer_type_t pstk_lyt_match, int thin_draw, int invert);