[nginx] Removed extra allocation for $sent_http_last_modified.

[Maxim Dounin]

details:   http://hg.nginx.org/nginx/rev/c21e341c51cb
branches:  
changeset: 5434:c21e341c51cb
user:      Maxim Dounin <mdounin at mdounin.ru>
date:      Thu Oct 31 04:02:59 2013 +0400
description:
Removed extra allocation for $sent_http_last_modified.

There is no need to allocate memory for "Last-Modified: " string,
the variable only contains date itself.

diffstat:

 src/http/ngx_http_variables.c |  3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diffs (13 lines):

diff --git a/src/http/ngx_http_variables.c b/src/http/ngx_http_variables.c
--- a/src/http/ngx_http_variables.c
+++ b/src/http/ngx_http_variables.c
@@ -1744,8 +1744,7 @@ ngx_http_variable_sent_last_modified(ngx
     }
 
     if (r->headers_out.last_modified_time >= 0) {
-        p = ngx_pnalloc(r->pool,
-                   sizeof("Last-Modified: Mon, 28 Sep 1970 06:00:00 GMT") - 1);
+        p = ngx_pnalloc(r->pool, sizeof("Mon, 28 Sep 1970 06:00:00 GMT") - 1);
         if (p == NULL) {
             return NGX_ERROR;
         }