[glom] Add a comment.

[Murray Cumming <murrayc src gnome org>]

commit 675fdd9afbb76e5d032a8bdc78100826facbc73e
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Dec 19 11:59:12 2013 +0100

    Add a comment.

 tests/test_field_file_format.cc |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/tests/test_field_file_format.cc b/tests/test_field_file_format.cc
index ec24c5b..da930cb 100644
--- a/tests/test_field_file_format.cc
+++ b/tests/test_field_file_format.cc
@@ -49,6 +49,10 @@ static bool test_value(Glom::Field::glom_field_type field_type, const Gnome::Gda
 
 int main()
 {
+  // We use the current locale, because this is called by an *_in_locales.sh
+  // script to check that this works in all locales.
+  // See, for instance, libgda bug https://bugzilla.gnome.org/show_bug.cgi?id=720594
+  //
   // Set the locale for any streams to the user's current locale,
   // We should not rely on the default locale of
   // any streams (we should always do an explicit imbue()),