fix bug in limited walks

Author: fizx

Diff for: lib/fraggle/client.rb

@@ -119,8 +119,10 @@ def walk(rev, path, off=0, lim=MaxInt64, ents=[], &blk)
     end
 
     def all(m, rev, path, off, lim, ents=[], &blk)
+      # We're decrementing lim as we go, so we need to return
+      # the accumulated values
       if lim == 0
-        cn.next_tick { blk.call([], nil) }
+        cn.next_tick { blk.call(ents, nil) }
         return
       end