Fixed screenshots count in search results

Now packages without screenshots do not raise an exception any more.

app/views/packages/_packages_search_results.html.erb

@@ -1,11 +1,11 @@
 <%# Show search results %>
 
 <% if @packages.count>0 %>
-  <h1>Class=<%= @packages.class %></h1>
 <ul>
   <% @packages.each do |package| %>
+  <h2><%= package.name %></h2>
   <li>
-    <% if package.screenshots %>
+    <% if package.screenshots.count>0 %>
       <%= image_tag package.screenshots.first.image_url('small') %>
     <% end %>
   </li>