Fixed initial databases if not enabled.

services/mariaDB.nix

@@ -14,7 +14,7 @@ let
         create user if not exists ${cfg.user}@'localhost' identified by ${password};
         grant all privileges on ${cfg.name}.* to ${cfg.user}@'localhost' identified by ${password};
       '';
-    } else {};
+    } else { name = ""; };
 in mkIf (elem "mariaDB" config.machine.services) {
   services.mysql = {
     enable = true;