Fixed that sidebar with hook content only should not be hidden.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@9598 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/views/layouts/base.html.erb

@@ -56,10 +56,10 @@
     <% end %>
 </div>
 
-<%= tag('div', {:id => 'main', :class => (has_content?(:sidebar) ? '' : 'nosidebar')}, true) %>
+<%= tag('div', {:id => 'main', :class => (sidebar_content? ? '' : 'nosidebar')}, true) %>
     <div id="sidebar">
         <%= yield :sidebar %>
-        <%= call_hook :view_layouts_base_sidebar %>
+        <%= view_layouts_base_sidebar_hook_response %>
     </div>
 
     <div id="content">