Very small patches for review

[Peter Harvey <peter a harvey gmail com>]

egg-toolbars-model:
  Removed unused struct.

ephy-bookmarks-menu:
  Do not add bookmarks to a flat menu more than once.
  Bookmarks may still appear at different places in the hierarchy.

ephy-node:
  Skip writing out a string property if it is NULL (fixes segfault).

Index: lib/egg/egg-toolbars-model.h
===================================================================
RCS file: /cvs/gnome/epiphany/lib/egg/egg-toolbars-model.h,v
retrieving revision 1.22
diff -r1.22 egg-toolbars-model.h
105,110d104
< struct EggToolbarsItemAvailable
< {
<   const char * name;
<   guint        available;
< };
< 

Index: src/bookmarks/ephy-bookmarks-menu.c
===================================================================
RCS file: /cvs/gnome/epiphany/src/bookmarks/ephy-bookmarks-menu.c,v
retrieving revision 1.42
diff -r1.42 ephy-bookmarks-menu.c
77c77
< 	guint i;
---
> 	guint i, j;
84c84
< 		GPtrArray *subset, *covering, *subdivisions, *submenus;
---
> 		GPtrArray *subset, *covering, *subdivisions, *submenus, *unused;
99a100
> 		unused = g_ptr_array_sized_new (bookmarks->len);
146a148,153
> 		
> 		/* Build a list of bookmarks which don't appear in any subdivision yet. */
> 		for (i = 0; i < bookmarks->len; i++)
> 		{
> 			g_ptr_array_add (unused, g_ptr_array_index (bookmarks, i));
> 		}
152c159
< 			ephy_nodes_get_covered (topic, bookmarks, subset);
---
> 			ephy_nodes_get_covered (topic, unused, subset);
157a165,170
> 			
> 			/* Record that each bookmark has been added. */
> 			for (j = 0; j < subset->len; j++)
> 			{
> 				g_ptr_array_remove_fast (unused, g_ptr_array_index (subset, j));
> 			}
164a178
> 		g_ptr_array_free (unused, TRUE);