module: extend parameter checks in conf_deactivate_modules()

diff --git a/src/knot/conf/module.c b/src/knot/conf/module.c
index 77d5d891ee2c8f197be7ccb0d127b11fa039bcdd..32006dc75fd71f26b65ae4d0900c0b865fe32160 100644 (file)
--- a/src/knot/conf/module.c
+++ b/src/knot/conf/module.c
@@ -440,7 +440,7 @@ void conf_deactivate_modules(
        list_t *query_modules,
        struct query_plan **query_plan)
 {
-       if (query_modules == NULL || query_plan == NULL) {
+       if (query_modules == NULL || query_plan == NULL || *query_plan == NULL) {
                return;
        }