# HG changeset patch
# User Igor Sysoev <igor@sysoev.ru>
# Date 1227892955 0
# Node ID ac0cf19eb58237e977ee02e4bcdfc5a2f6e33f78
# Parent  58c6a9ca781641ccb7e3ac4c23ef5e3277174b89
create empty radix tree for "geo $geo { }" case

diff --git a/src/http/modules/ngx_http_geo_module.c b/src/http/modules/ngx_http_geo_module.c
--- 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_c
         }
 
     } 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;