Update from Padraig, one additional valgrind warning I found cleaned up

diff --cc libmemcached/memcached.hpp
index 46573f4959b2aab0a874da0eae407965fb2360a3,92cd9a68826aa09a04e5a74363c09bb6dfc7f590..d7086b4ce301ea11a876fdcb3a20f8b0831a009a
--- 1/libmemcached/memcached.hpp
--- 2/libmemcached/memcached.hpp
+++ b/libmemcached/memcached.hpp
@@@ -236,7 -236,8 +236,13 @@@ public
        ret_val.reserve(value_length);
        ret_val.assign(value, value + value_length);
        key.assign(ret_key);
+       free(value);
      }
++    else if (value)
++    {
++      free(value);
++    }
++
      return rc;
    }