[glib] gio: Include filename in error message

[Matthias Clasen <matthiasc src gnome org>]

commit 42699e37bea10fc51dd1a79888dfd8edae84c70a
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Jan 27 21:05:31 2016 -0500

    gio: Include filename in error message
    
    I'm tired of seeing 'No such file or directory' in the logs without
    a hint as to what is actually wrong. Including the filename here
    may help me tracking down a bug in the continuous infrastructure.

 gio/glocalfileenumerator.c |   10 +++++++---
 1 files changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/gio/glocalfileenumerator.c b/gio/glocalfileenumerator.c
index 60c9b9a..8f0d091 100644
--- a/gio/glocalfileenumerator.c
+++ b/gio/glocalfileenumerator.c
@@ -232,11 +232,15 @@ _g_local_file_enumerator_new (GLocalFile *file,
   dir = opendir (filename);
   if (dir == NULL)
     {
+      gchar *utf8_filename;
       errsv = errno;
 
-      g_set_error_literal (error, G_IO_ERROR,
-                           g_io_error_from_errno (errsv),
-                           g_strerror (errsv));
+      utf8_filename = g_filename_to_utf8 (filename, -1, NULL, NULL, NULL);
+      g_set_error (error, G_IO_ERROR,
+                   g_io_error_from_errno (errsv),
+                   "Error opening directory '%s': %s",
+                   utf8_filename, g_strerror (errsv));
+      g_free (utf8_filename);
       g_free (filename);
       return NULL;
     }