Fix check of tty_getattr return value.

ChangeLog

+2017-12-26  Niels Mller  <nisse@lysator.liu.se>
+
+	* src/unix_interact.c (unix_get_attributes): Fix check of
+	tty_getattr return value.
+
 2017-01-04  Niels Mller  <nisse@lysator.liu.se>
 
 	* src/testsuite/lshd-umask-test: New test case, check that umask

src/unix_interact.c

@@ -389,7 +389,7 @@ unix_get_attributes(struct interact *s)
       res->super.make_raw = do_make_raw;
       res->super.encode = do_encode;
       
-      if (!tty_getattr(self->tty_fd, &res->ios) < 0)
+      if (!tty_getattr(self->tty_fd, &res->ios))
 	{
 	  KILL(res);
 	  return NULL;