[gnome-builder] subprocess-launcher: check for std*_fd as -1

[Christian Hergert <chergert src gnome org>]

commit 08ecf324875fb82ff7b1db32f89a3746815291e7
Author: Christian Hergert <chergert redhat com>
Date:   Sun Dec 11 21:00:02 2016 -0800

    subprocess-launcher: check for std*_fd as -1

 libide/subprocess/ide-subprocess-launcher.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/libide/subprocess/ide-subprocess-launcher.c b/libide/subprocess/ide-subprocess-launcher.c
index 60eead3..4688a3b 100644
--- a/libide/subprocess/ide-subprocess-launcher.c
+++ b/libide/subprocess/ide-subprocess-launcher.c
@@ -246,19 +246,19 @@ ide_subprocess_launcher_spawn_worker (GTask        *task,
   g_subprocess_launcher_set_child_setup (launcher, child_setup_func, NULL, NULL);
   g_subprocess_launcher_set_cwd (launcher, priv->cwd);
 
-  if (priv->stdin_fd)
+  if (priv->stdin_fd != -1)
     {
       g_subprocess_launcher_take_stdin_fd (launcher, priv->stdin_fd);
       priv->stdin_fd = -1;
     }
 
-  if (priv->stdout_fd)
+  if (priv->stdout_fd != -1)
     {
       g_subprocess_launcher_take_stdout_fd (launcher, priv->stdout_fd);
       priv->stdout_fd = -1;
     }
 
-  if (priv->stderr_fd)
+  if (priv->stderr_fd != -1)
     {
       g_subprocess_launcher_take_stderr_fd (launcher, priv->stderr_fd);
       priv->stderr_fd = -1;