--- a/src/network/newgrf_download.cpp	Fri Jul 18 21:59:53 2008 +0300
+++ b/src/network/newgrf_download.cpp	Fri Jul 18 22:41:08 2008 +0300
@@ -329,6 +329,8 @@
             // copy-past from newgrf_config.cpp CopyGRFConfigList
             GRFConfig *c = CallocT<GRFConfig>(1);
             *c = *src;
+            c->next = NULL;
+
             if (src->filename  != NULL) c->filename  = strdup(src->filename);
             if (src->name      != NULL) c->name      = strdup(src->name);
             if (src->info      != NULL) c->info      = strdup(src->info);