varnish: update plugin_register_complex_read() to new default value

... just a follow up to cce136946b, in which one of the two
plugin_register_complex_read() calls got missed out.

diff --git a/src/varnish.c b/src/varnish.c
index 1d8fb55..0ea8c7f 100644 (file)
--- a/src/varnish.c
+++ b/src/varnish.c
@@ -901,7 +901,7 @@ static int varnish_config_instance (const oconfig_item_t *ci) /* {{{ */
        plugin_register_complex_read (/* group = */ "varnish",
                        /* name      = */ callback_name,
                        /* callback  = */ varnish_read,
-                       /* interval  = */ NULL,
+                       /* interval  = */ 0,
                        /* user data = */ &ud);
 
        have_instance = 1;