(xg_make_tool_item): Insert comment about eventbox.

src/ChangeLog

+2011-09-07  Jan Djärv  <jan.h.d@swipnet.se>
+
+	* gtkutil.c (xg_make_tool_item): Insert comment about eventbox.
+
 2011-09-06  Paul Eggert  <eggert@cs.ucla.edu>
 
 	isnan: Fix porting problem to Solaris 10 with bundled gcc.

src/gtkutil.c

@@ -4219,6 +4219,7 @@ xg_make_tool_item (FRAME_PTR f,
   GtkToolItem *ti = gtk_tool_item_new ();
   GtkWidget *vb = horiz ? gtk_hbox_new (FALSE, 0) : gtk_vbox_new (FALSE, 0);
   GtkWidget *wb = gtk_button_new ();
+  /* The eventbox is here so we can have tooltips on disabled items.  */
   GtkWidget *weventbox = gtk_event_box_new ();
 
   if (wimage && !text_image)