memory plugin: constify

diff --git a/src/memory.c b/src/memory.c
index ea16ce3..3d8a867 100644 (file)
--- a/src/memory.c
+++ b/src/memory.c
@@ -237,7 +237,7 @@ static int memory_read_internal (value_list_t *vl)
         * vm.stats.vm.v_inactive_count: 113730
         * vm.stats.vm.v_cache_count: 10809
         */
-       char *sysctl_keys[8] =
+       const char *sysctl_keys[8] =
        {
                "vm.stats.vm.v_page_size",
                "vm.stats.vm.v_page_count",