Gearman crashes using memcached plugin on reply start

[Kiselev Stanislav]

./gearmand -p 4733 --libmemcached-servers=188.93.61.11:30021 -q libmemcached --verbose=DEBUG

...............
  INFO 2012-08-26 06:44:11.985009 [ main ] libmemcached replay start
  DEBUG 2012-08-26 06:44:11.985076 [ 3 ] Entering thread event loop -> libgearman-server/gearmand_thread.cc:295
  DEBUG 2012-08-26 06:44:11.985112 [ 4 ] Entering thread event loop -> libgearman-server/gearmand_thread.cc:295
Segmentation fault

--- libgearman-server/plugins/queue/libmemcached/queue.cc_orig 2012-09-26 10:48:01.000000000 +0400
+++ libgearman-server/plugins/queue/libmemcached/queue.cc 2012-09-26 10:49:34.000000000 +0400
@@ -84,7 +84,7 @@

   memcached_st* clone()
   {
- if (clone_)
+ if (NULL == clone_)
     {
       clone_= memcached_clone(NULL, memc_);
     }