fixup! tty: validate file descriptor to avoid int32 overflow

Author: aduh95

test/pseudo-tty/test-tty-isatty.js

@@ -10,7 +10,7 @@ strictEqual(isatty(2), true, 'stderr reported to not be a tty, but it is');
 
 strictEqual(isatty(-1), false, '-1 reported to be a tty, but it is not');
 strictEqual(isatty(55555), false, '55555 reported to be a tty, but it is not');
-strictEqual(isatty(2**31), false, '2^31 reported to be a tty, but it is not');
+strictEqual(isatty(2 ** 31), false, '2^31 reported to be a tty, but it is not');
 strictEqual(isatty(1.1), false, '1.1 reported to be a tty, but it is not');
 strictEqual(isatty('1'), false, '\'1\' reported to be a tty, but it is not');
 strictEqual(isatty({}), false, '{} reported to be a tty, but it is not');