Fix test-readdir.js
Fix test-readdir.js

Was broken because I added "throws_error.js" to the fixtures directory.
Problem appeared in bfa36136dac787793bc5106da57cccbb8db1ce14.

dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,dreamllq/node,isaacs/nshtools