Index: map_2nets.c
===================================================================
--- map_2nets.c	(revision 35012)
+++ map_2nets.c	(revision 35013)
@@ -127,8 +127,9 @@
 
 static int list_subc_cb(void *ctx, pcb_board_t *pcb, pcb_subc_t *subc, int enter)
 {
-	pcb_board_t tmp = {0};
+	pcb_board_t tmp;
 
+	tmp = *pcb;
 	tmp.Data = subc->data;
 	pcb_loop_all(&tmp, ctx,
 		NULL, /* layer */