zero fcn->updating after node allocation

src/http/ngx_http_file_cache.c

diff --git a/src/http/ngx_http_file_cache.c b/src/http/ngx_http_file_cache.c
index c9ecded..d14a7c5 100644
--- a/src/http/ngx_http_file_cache.c
+++ b/src/http/ngx_http_file_cache.c
@@ -581,6 +581,7 @@
 
     fcn->uses = 1;
     fcn->count = 1;
+    fcn->updating = 0;
 
 renew:
 
@@ -1429,6 +1430,7 @@
         fcn->valid_msec = c->valid_msec;
         fcn->error = 0;
         fcn->exists = 1;
+        fcn->updating = 0;
         fcn->uniq = c->uniq;
         fcn->valid_sec = c->valid_sec;
         fcn->body_start = c->body_start;