bugfix for symptom: no VOTable returned if no datasets found; however should return empty VOTable

data-discovery/src/main/java/webapi/formatfilter/FormatResponseFilter.java

@@ -56,7 +56,7 @@ public class FormatResponseFilter implements Filter
 
          String[] pubdidArr = responseWrapper.getPubdidArr();
 
-         if ((pubdidArr != null) && (pubdidArr.length > 0))
+         if (pubdidArr != null)
          {
             PrintWriter responseWriter = ((HttpServletResponse)response).getWriter();
 
@@ -81,7 +81,7 @@ public class FormatResponseFilter implements Filter
          }
          else
          {
-            LOGGER.fine("SearchServlet returned no ID's.");
+            LOGGER.warning("SearchServlet returned null pubdidArr.");
          }
       }
       catch(MultiValuedParamNotSupported ex)