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

sitescripts/logs/template/subscription.html

Index: sitescripts/logs/template/subscription.html
===================================================================
--- a/sitescripts/logs/template/subscription.html
+++ b/sitescripts/logs/template/subscription.html
@@ -43,19 +43,20 @@
         <td>Month {{month|monthname}} (<a href="{{overviewURL}}">To overview page</a>)</td>
       </tr>
     </table>
 
     <div class="block_title">Days of month</div>
     <div class="block">
       <table align="center" style="margin-bottom: 20px;">
         <tr align="bottom">
-          {%- set maxHits, maxBandwidth = day|max(attribute='hits'), day|max(attribute='bandwidth') %}
-          {%- set totalHits = day|sum(attribute='hits') %}
-          {%- set totalBandwidth = day|sum(attribute='bandwidth') %}
+          {%- set maxHits = day|max(attribute='hits')|ensuremin(1) %}
+          {%- set maxBandwidth = day|max(attribute='bandwidth')|ensuremin(1) %}
+          {%- set totalHits = day|sum(attribute='hits')|ensuremin(1) %}
+          {%- set totalBandwidth = day|sum(attribute='bandwidth')|ensuremin(1) %}
           {%- set dayCount = day|length %}
           {%- if currentMonth and dayCount > 1 %}
             {%- set totalHits = totalHits - day[-1].hits %}
             {%- set totalBandwidth = totalBandwidth - day[-1].bandwidth %}
             {%- set dayCount = dayCount - 1 %}
           {%- endif %}
           {%- for info in day %}
           <td align="center" style="vertical-align: bottom;">