fixed bug when whoosh failed indexing an new repository.

rhodecode/lib/indexers/daemon.py

@@ -86,8 +86,9 b' class WhooshIndexingDaemon(object):'
         based on repository walk function
         """
         index_paths_ = set()
-        tip = repo.get_changeset()
         try:
+            tip = repo.get_changeset()
+            
             for topnode, dirs, files in tip.walk('/'):
                 for f in files:
                     index_paths_.add(jn(repo.path, f.path))