added no-data-to-display when the query has no entries to display

git-svn-id: https://dev.finn.de/svn/cockpit/branches/reporting_merge@1542 7926756e-e54e-46e6-9721-ed318f58905e

app/views/cost_reports/index.rhtml

@@ -52,5 +52,9 @@
   <% end %>
 </div>
 
+<% if @query.result.count > 0 %>
   <%= render :partial => @table_partial, :locals => {:query => @query, :walker => @query.walker} %>
   <p class="footnote"><%= l(:text_costs_are_rounded_note) %></p>
+<% else %>
+  <p class="nodata"><%= l(:label_no_data) %></p>
+<% end %>