[glib] GConverterInputStream: fix an infinite loop when fill_buffer returns an error

[Dan Winship <danw src gnome org>]

commit adea9fb25210f2d04bcf2453c18847fb965927f7
Author: Dan Winship <danw gnome org>
Date:   Tue Apr 17 11:46:50 2012 -0400

    GConverterInputStream: fix an infinite loop when fill_buffer returns an error
    
    The loop was using a GConverterResult variable where it meant to use a
    gssize, and since GConverterResult was ending up as an unsigned type,
    this meant the (res < 0) check always failed.

 gio/gconverterinputstream.c |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/gio/gconverterinputstream.c b/gio/gconverterinputstream.c
index d81cd90..2fbf94d 100644
--- a/gio/gconverterinputstream.c
+++ b/gio/gconverterinputstream.c
@@ -495,18 +495,18 @@ g_converter_input_stream_read (GInputStream *stream,
 	{
 	  /* Need more data */
 	  my_error2 = NULL;
-	  res = fill_input_buffer (cstream,
-				   buffer_data_size (&priv->input_buffer) + 4096,
-				   cancellable,
-				   &my_error2);
-	  if (res < 0)
+	  nread = fill_input_buffer (cstream,
+				     buffer_data_size (&priv->input_buffer) + 4096,
+				     cancellable,
+				     &my_error2);
+	  if (nread < 0)
 	    {
 	      /* Can't read any more data, return that error */
 	      g_error_free (my_error);
 	      g_propagate_error (error, my_error2);
 	      return -1;
 	    }
-	  else if (res == 0)
+	  else if (nread == 0)
 	    {
 	      /* End of file, try INPUT_AT_END */
 	      priv->at_input_end = TRUE;