fix file leak for HEAD requests

src/http/modules/ngx_http_autoindex_module.c

diff --git a/src/http/modules/ngx_http_autoindex_module.c b/src/http/modules/ngx_http_autoindex_module.c
index e08e63c..ae9eaab 100644
--- a/src/http/modules/ngx_http_autoindex_module.c
+++ b/src/http/modules/ngx_http_autoindex_module.c
@@ -236,6 +236,11 @@
     rc = ngx_http_send_header(r);
 
     if (rc == NGX_ERROR || rc > NGX_OK || r->header_only) {
+        if (ngx_close_dir(&dir) == NGX_ERROR) {
+            ngx_log_error(NGX_LOG_ALERT, r->connection->log, ngx_errno,
+                          ngx_close_dir_n " \"%V\" failed", &path);
+        }
+
         return rc;
     }