[PATCH] Fixed segmentation fault with empty config on Windows

[Maxim Dounin]

# HG changeset patch
# User Maxim Dounin <mdounin at mdounin.ru>
# Date 1317124226 -14400
# Node ID 7746ca466f939e2407373b5549b395fd12a72216
# Parent  959616f81d4d0b3045e78d8ac68ec7261a406b06
Fixed segmentation fault with empty config on Windows.

See here for report:
http://mailman.nginx.org/pipermail/nginx-ru/2011-September/043288.html

diff --git a/src/http/ngx_http.c b/src/http/ngx_http.c
--- a/src/http/ngx_http.c
+++ b/src/http/ngx_http.c
@@ -1747,10 +1747,12 @@ ngx_http_add_listening(ngx_conf_t *cf, n
 
 #if (NGX_WIN32)
     {
-    ngx_iocp_conf_t  *iocpcf;
-
-    iocpcf = ngx_event_get_conf(cf->cycle->conf_ctx, ngx_iocp_module);
-    if (iocpcf->acceptex_read) {
+    ngx_iocp_conf_t  *iocpcf = NULL;
+
+    if (ngx_get_conf(cf->cycle->conf_ctx, ngx_events_module)) {
+        iocpcf = ngx_event_get_conf(cf->cycle->conf_ctx, ngx_iocp_module);
+    }
+    if (iocpcf && iocpcf->acceptex_read) {
         ls->post_accept_buffer_size = cscf->client_header_buffer_size;
     }
     }