Neat hack to <r:gallery>

I just made a little tweak to the gallery_tags.rb from the Gallery Extension.

It makes it easy to show a gallery somewhere on any page, if that page has a base gallery set. You can also hide a potential surrounding div if it is not needed (not containing a gallery). For example:

<r:gallery fail_silently="true"><div id="gallery">
  <r:gallery:lightbox />
</div></r:gallery>

Without the hack, (and the fail_silently attribute) you would get a nasty "undefined method `items' for nil:NilClass" if there was no base gallery set on that page. Of course, it would also work if you are specifying a gallery by name or id, instead of relying on a base gallery being set. 

And all it took was;

tag "gallery" do |tag| tag.locals.gallery = find_gallery(tag)
- tag.expand
+ tag.expand unless tag.locals.gallery.nil? && tag.attr['fail_silently']
end