Geo: properly initialize ngx_cidr_t when dealing with "default".

src/http/modules/ngx_http_geo_module.c

diff --git a/src/http/modules/ngx_http_geo_module.c b/src/http/modules/ngx_http_geo_module.c
index d6bdacc..4bad08d 100644
--- a/src/http/modules/ngx_http_geo_module.c
+++ b/src/http/modules/ngx_http_geo_module.c
@@ -1037,7 +1037,7 @@
 #endif
 
     if (ngx_strcmp(value[0].data, "default") == 0) {
-        /* cidr.family = AF_INET; */
+        cidr.family = AF_INET;
         cidr.u.in.addr = 0;
         cidr.u.in.mask = 0;
         net = &value[0];