From 69b5a6ddfb5226c73b6931fdfc9d0b91ba6bbe5b Mon Sep 17 00:00:00 2001
From: Igor Sysoev <igor@sysoev.ru>
Date: Fri, 28 Nov 2008 17:22:35 +0000
Subject: [PATCH] create empty radix tree for "geo $geo { }" case

---
 src/http/modules/ngx_http_geo_module.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/http/modules/ngx_http_geo_module.c b/src/http/modules/ngx_http_geo_module.c
index 5fc63210c..bba399f6c 100644
--- a/src/http/modules/ngx_http_geo_module.c
+++ b/src/http/modules/ngx_http_geo_module.c
@@ -255,6 +255,13 @@ ngx_http_geo_block(ngx_conf_t *cf, ngx_command_t *cmd, void *conf)
         }
 
     } else {
+        if (ctx.tree == NULL) {
+            ctx.tree = ngx_radix_tree_create(cf->pool, -1);
+            if (ctx.tree == NULL) {
+                return NGX_CONF_ERROR;
+            }
+        }
+
         var->get_handler = ngx_http_geo_cidr_variable;
         var->data = (uintptr_t) ctx.tree;