fixed handling of null referer in crawlOrder

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@2384 6c8d7289-2bf4-0310-a012-ef5d649a1542

htroot/yacy/crawlOrder.java

@@ -177,7 +177,7 @@ public final class crawlOrder {
                     if (!newURL.equals(urlv.get(0))) {
                         env.getLog().logWarning("crawlOrder: Received not normalized URL " + urlv.get(0));    
                     }
-                    String refURL = new URL((String) refv.get(0)).toNormalform();
+                    String refURL = (refv.get(0) == null) ? null : new URL((String) refv.get(0)).toNormalform();
                     if ((refURL != null) && (!refURL.equals(refv.get(0)))) {
                         env.getLog().logWarning("crawlOrder: Received not normalized Referer URL " + refv.get(0) + " of URL " + urlv.get(0));    
                     }

source/de/anomic/net/URL.java

@@ -38,6 +38,7 @@ public class URL {
     private int port;
     
     public URL(String url) throws MalformedURLException {
+        if (url == null) throw new MalformedURLException("url string is null");
         parseURLString(url);
     }