[wing/wip/nacho/poll-stream] Fix closing stream

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 9c1fef9cf115dc49cfe6a6982c87d19216f0697a
Author: Ignacio Casal Quinteiro <qignacio amazon com>
Date:   Wed Nov 28 16:28:44 2018 +0100

    Fix closing stream

 wing/winginputstream.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
---
diff --git a/wing/winginputstream.c b/wing/winginputstream.c
index 1b5994a..83886ce 100644
--- a/wing/winginputstream.c
+++ b/wing/winginputstream.c
@@ -228,7 +228,7 @@ wing_input_stream_close (GInputStream  *stream,
   wing_stream = WING_INPUT_STREAM (stream);
   priv = wing_input_stream_get_instance_private (wing_stream);
 
-  if (!priv->close_handle)
+  if (priv->close_handle == INVALID_HANDLE_VALUE)
     return TRUE;
 
   res = CloseHandle (priv->handle);
@@ -245,6 +245,8 @@ wing_input_stream_close (GInputStream  *stream,
       return FALSE;
     }
 
+  priv->handle = INVALID_HANDLE_VALUE;
+
   return TRUE;
 }