Index: hid_cam.c
===================================================================
--- hid_cam.c	(revision 27415)
+++ hid_cam.c	(revision 27416)
@@ -476,7 +476,13 @@
 	return dst->exported_grps;
 }
 
+void pcb_cam_nolayer(pcb_board_t *pcb, const char *src, const char **fn_out)
+{
+	if (src != NULL)
+		*fn_out = src;
+}
 
+
 typedef struct  {
 	pcb_cam_t *cam;
 	const pcb_layergrp_t *grp;