zlib: Handle empty zlib_save_level the same as if it doesn't exist

diff --git a/src/plugins/zlib/zlib-plugin.c b/src/plugins/zlib/zlib-plugin.c
index ff43994b8e79ca672a459d7a5845209bf701b1c5..f716058136c6f5b19ce80b1e375f03cbab6bf36f 100644 (file)
--- a/src/plugins/zlib/zlib-plugin.c
+++ b/src/plugins/zlib/zlib-plugin.c
@@ -355,7 +355,7 @@ static void zlib_mail_user_created(struct mail_user *user)
        }
        name = zuser->save_handler == NULL ? NULL :
                mail_user_plugin_getenv(user, "zlib_save_level");
-       if (name != NULL) {
+       if (name != NULL && name[0] != '\0') {
                if (str_to_int(name, &zuser->save_level) < 0 ||
                    zuser->save_level < zuser->save_handler->get_min_level() ||
                    zuser->save_level > zuser->save_handler->get_max_level()) {