Fix error

bench/bench-uthash.c

@@ -1,4 +1,5 @@
 #define NDEBUG
+#define  _GNU_SOURCE
 
 #include <stdlib.h>
 #include <stdio.h>
@@ -202,9 +203,8 @@ static void test_sort(size_t n)
 const config_func_t table[] = {
   { 10,    "List", 10000000, 0, test_list, 0},
   { 20,   "Array", 100000000, 0, test_array, 0},
-  { 30,  "Rbtree", 1000000, 0, test_rbtree, 0},
   { 40,    "dict", 1000000, 0, test_dict, 0},
-  { 41, "dictBig", 1000000, 0, test_dict_big, 0}
+  { 41, "dictBig", 1000000, 0, test_dict_big, 0},
   { 50,    "sort", 10000000, 0, test_sort, 0}
 };