added missing hachCode computation for previous feature

this solves also the missing image double-check fetaure!

git-svn-id: https://svn.berlios.de/svnroot/repos/yacy/trunk@4500 6c8d7289-2bf4-0310-a012-ef5d649a1542

source/de/anomic/plasma/plasmaSnippetCache.java

@@ -242,6 +242,9 @@ public class plasmaSnippetCache {
             if ((this.name == null) || (this.name.length() == 0)) this.name = "_";
             if ((this.attr == null) || (this.attr.length() == 0)) this.attr = "_";
         }
+        public int hashCode() {
+            return href.hashCode();
+        }
     }
     
     public static boolean existsInCache(yacyURL url, Set<String> queryhashes) {