[nginx] Access log: fix default value, broken by cb308813b453.

[Sergey Kandaurov]

details:   http://hg.nginx.org/nginx/rev/7f425d67f91a
branches:  
changeset: 5719:7f425d67f91a
user:      Piotr Sikora <piotr at cloudflare.com>
date:      Tue Jun 03 10:53:48 2014 -0700
description:
Access log: fix default value, broken by cb308813b453.

log->filter ("if" parameter) was uninitialized when the default value
was being used, which would lead to a crash (SIGSEGV) when access_log
directive wasn't specified in the configuration.

Zero-fill the whole structure instead of zeroing fields one-by-one
in order to prevent similar issues in the future.

Signed-off-by: Piotr Sikora <piotr at cloudflare.com>

diffstat:

 src/http/modules/ngx_http_log_module.c |  7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)

diffs (22 lines):

diff -r c46657e391a3 -r 7f425d67f91a src/http/modules/ngx_http_log_module.c
--- a/src/http/modules/ngx_http_log_module.c	Tue Jun 03 17:53:03 2014 +0400
+++ b/src/http/modules/ngx_http_log_module.c	Tue Jun 03 10:53:48 2014 -0700
@@ -1109,16 +1109,13 @@ ngx_http_log_merge_loc_conf(ngx_conf_t *
         return NGX_CONF_ERROR;
     }
 
+    ngx_memzero(log, sizeof(ngx_http_log_t));
+
     log->file = ngx_conf_open_file(cf->cycle, &ngx_http_access_log);
     if (log->file == NULL) {
         return NGX_CONF_ERROR;
     }
 
-    log->script = NULL;
-    log->disk_full_time = 0;
-    log->error_log_time = 0;
-    log->syslog_peer = NULL;
-
     lmcf = ngx_http_conf_get_module_main_conf(cf, ngx_http_log_module);
     fmt = lmcf->formats.elts;