Defensive coding to avoid a FeedException when there is no description

git-svn-id: http://scm.dspace.org/svn/repo/trunk@2258 9c30dcfa-912a-0410-8fc2-9e0234be79fd

dspace-jspui/src/main/java/org/dspace/app/webui/servlet/FeedServlet.java

@@ -427,8 +427,13 @@ public class FeedServlet extends DSpaceServlet
     		}
     		
     		channel.setItems(items);
-    		
+
-    		return channel;
+            // If the description is null, replace it with an empty string
+            // to avoid a FeedException
+            if (channel.getDescription() == null)
+                channel.setDescription("");
+
+            return channel;
     	}
     	catch (BrowseException e)
     	{