addded alt attribute on simplenews template img

sites/all/modules/gui/materiobasemod/templates/simplenews_6585_node.html

@@ -6,7 +6,7 @@
           <tbody>
             <tr>
               <td style="color: #444444; font-family: arial; font-size: 12px; background-color: #ffffff; padding: 0;" align="left">
-                <img src="/sites/default/files/uploaderuneimage.png" width="600" height="400">
+                <img src="/sites/default/files/uploaderuneimage.png" alt="daily cover picture" width="600" height="400">
               </td>
             </tr>
           </tbody>