Test guarded access to stats in fs.statSync() wrapper

Adds extra test that’s left over from an attempted alternative
to 14aaa19.

Author: addaleax

test/stats-uid-gid.js

@@ -29,9 +29,16 @@ test('graceful fs uses same stats constructor as fs', function (t) {
 })
 
 test('does not throw when async stat fails', function (t) {
-  fs.stat(__filename + ' this does not exist', function (er, stats) {
+  gfs.stat(__filename + ' this does not exist', function (er, stats) {
     t.ok(er)
     t.notOk(stats)
     t.end()
   })
 })
+
+test('does not throw when async stat fails', function (t) {
+  t.throws(function() {
+    gfs.statSync(__filename + ' this does not exist')
+  }, /ENOENT/)
+  t.end()
+})