fix the previous commit

src/http/modules/perl/nginx.xs

diff --git a/src/http/modules/perl/nginx.xs b/src/http/modules/perl/nginx.xs
index 1182d85..771fd81 100644
--- a/src/http/modules/perl/nginx.xs
+++ b/src/http/modules/perl/nginx.xs
@@ -643,7 +643,7 @@
     clcf = ngx_http_get_module_loc_conf(r, ngx_http_core_module);
 
     of.test_dir = 0;
-    of.retest = clcf->open_file_cache_retest;
+    of.valid = clcf->open_file_cache_valid;
     of.errors = clcf->open_file_cache_errors;
     of.events = clcf->open_file_cache_events;