Index: board.c
===================================================================
--- board.c	(revision 31700)
+++ board.c	(revision 31701)
@@ -427,7 +427,7 @@
 	if (to < from)
 		return -1;
 
-	for(gid = 0, grp = pcb->LayerGroups.grp; gid <= pcb->LayerGroups.len; gid++,grp++) {
+	for(gid = from, grp = pcb->LayerGroups.grp+from; gid <= pcb->LayerGroups.len+to; gid++,grp++) {
 		const char *s;
 
 		if (!(grp->ltype & accept))