lone/lisp: resolve some warnings

The compiler was warning that these functions
did not return a value in all possible paths.

Author: matheusmoreira

source/lone/lisp/module.c

@@ -51,6 +51,7 @@ static struct lone_lisp_value lone_lisp_module_name_to_key(struct lone_lisp *lon
 	case LONE_LISP_TYPE_BYTES:
 	case LONE_LISP_TYPE_VECTOR:
 	case LONE_LISP_TYPE_TABLE:
+	default:
 		/* invalid module name component */ linux_exit(-1);
 	}
 }

source/lone/lisp/modules/intrinsic/linux.c

@@ -385,6 +385,7 @@ static inline long lone_lisp_value_to_linux_system_call_argument(struct lone_lis
 	case LONE_LISP_TYPE_VECTOR:
 	case LONE_LISP_TYPE_TABLE:
 	case LONE_LISP_TYPE_MODULE:
+	default:
 		linux_exit(-1);
 	}
 }