Subscription stats: Make sure there can be no division by zero errors

sitescripts/logs/template/subscriptionsMain.html

 <!--
   - This file is part of the Adblock Plus web scripts,
   - Copyright (C) 2006-2012 Eyeo GmbH
   -
   - Adblock Plus is free software: you can redistribute it and/or modify
   - it under the terms of the GNU General Public License version 3 as
   - published by the Free Software Foundation.
   -
   - Adblock Plus is distributed in the hope that it will be useful,
   - but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 33 matching lines @@
     </table>
     <div class="block_title">Subscriptions</div>
     <div class="block">
       <table align="center">
       <tr>
         <th bgcolor="#ECECEC">Subscription</th>
         <th bgcolor="#66DDEE">Hits</th>
         <th bgcolor="#2EA495">Bandwidth</th>
         <th>&nbsp;</th>
       </tr>
-      {%- set maxHits = subscriptions|max(attribute='hits') %}
-      {%- set maxBandwidth = subscriptions|max(attribute='bandwidth') %}
+      {%- set maxHits = subscriptions|max(attribute='hits')|ensuremin(1) %}
+      {%- set maxBandwidth = subscriptions|max(attribute='bandwidth')|ensuremin(1) %}
       {%- for subscription in subscriptions %}
       <tr>
         <td><a href="{{subscription.url}}">{{subscription.fileName}}</a></td>
         <td align="right">{{subscription.hits}}</td>
         <td align="right">{{subscription.bandwidth|bytes}}</td>
         <td class="chart">
           <div class="hitsChart horizontal" style="width: {{(subscription.hits / maxHits * 100)|round(method='ceil')|int}}px;"></div><br />
           <div class="bandwidthChart horizontal" style="width: {{(subscription.bandwidth / maxBandwidth * 100)|round(method='ceil')|int}}px;"></div>
         </td>
       </tr>
       {%- endfor %}
       </table>
     </div>
   </body>
 </html>