patch for http://forum.yacy-websuche.de/viewtopic.php?p=21460#p21460

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@7399 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/net/yacy/document/Condenser.java

@@ -239,6 +239,7 @@ public final class Condenser {
             final Bitfield flagstemplate,
             final boolean useForLanguageIdentification,
             final DidYouMeanLibrary meaningLib) {
+        if (text == null) return;
         String word;
         Word wprop;
         sievedWordsEnum wordenum;