pty: More correct assertion

Unlikely this is a problem, but was pointed out in
https://bugzilla.gnome.org/show_bug.cgi?id=746667

(cherry picked from commit 3b1a3ce742c8dcbb58d0d434f82758d5156db9dc)

1 files changed, 1 insertions, 1 deletions

diff --git a/src/pty.c b/src/pty.c
index 1e3ec20c..384d783f 100644
--- a/src/pty.c
+++ b/src/pty.c
@@ -1338,7 +1338,7 @@ vte_pty_set_utf8(VtePty *pty,
         g_return_val_if_fail(VTE_IS_PTY(pty), FALSE);
 
         priv = pty->priv;
-        g_return_val_if_fail (priv->pty_fd > 0, FALSE);
+        g_return_val_if_fail (priv->pty_fd != -1, FALSE);
 
         if (tcgetattr(priv->pty_fd, &tio) == -1) {
                 int errsv = errno;