change for problem with NPE (seen as "PROXY Unknown Error while processing request")

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4745 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/de/anomic/http/JakartaCommonsHttpResponse.java

@@ -118,11 +118,15 @@ public class JakartaCommonsHttpResponse {
      */
     public InputStream getDataAsStream() throws IOException {
         InputStream inStream = method.getResponseBodyAsStream();
+        if(inStream != null) {
             if (getResponseHeader().gzip()) {
                 inStream = new GZIPInputStream(inStream);
             }
             // count bytes for overall http-statistics
             return new httpdByteCountInputStream(inStream, incomingAccountingName);
+        } else {
+            return null;
+        }
     }
 
     /*