Index: src_plugins/lib_gtk_common/wt_layer_selector_cr.c
===================================================================
--- src_plugins/lib_gtk_common/wt_layer_selector_cr.c	(revision 6735)
+++ src_plugins/lib_gtk_common/wt_layer_selector_cr.c	(revision 6736)
@@ -1,3 +1,5 @@
+/* COPYRIGHT: missing in the original file inherited from gEDA/PCB:
+   must be the same as in other gtk-related sources. */
 /*! \file <gtk-pcb-cell-render-visibility.c>
  *  \brief Implementation of GtkCellRenderer for layer visibility toggler
  *  \par More Information
Index: src_plugins/lib_gtk_common/wt_layer_selector_cr.h
===================================================================
--- src_plugins/lib_gtk_common/wt_layer_selector_cr.h	(revision 6735)
+++ src_plugins/lib_gtk_common/wt_layer_selector_cr.h	(revision 6736)
@@ -1,6 +1,8 @@
 #ifndef GHID_CELL_RENDERER_VISIBILITY_H__
 #define GHID_CELL_RENDERER_VISIBILITY_H__
 
+/* Cell renderer for the layer selector widget */
+
 #include <glib.h>
 #include <glib-object.h>