[glom] Improved stdcerr output.

[Murray Cumming <murrayc src gnome org>]

commit 16374dd301e7963ca02a0ad449f582c949648ebe
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Nov 3 22:36:02 2015 +0100

    Improved stdcerr output.

 .../libglom/python_embed/pygdavalue_conversions.cc |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/glom/libglom/python_embed/pygdavalue_conversions.cc 
b/glom/libglom/python_embed/pygdavalue_conversions.cc
index 78f9f6d..b6f5079 100644
--- a/glom/libglom/python_embed/pygdavalue_conversions.cc
+++ b/glom/libglom/python_embed/pygdavalue_conversions.cc
@@ -277,6 +277,7 @@ boost::python::object glom_pygda_value_as_boost_pyobject(const Glib::ValueBase&
         ret = boost::python::object(g_value_get_uint(boxed));
     } else {
       std::cerr << G_STRFUNC << ": Glom: G_VALUE_TYPE() returned unknown type: " << value_type << std::endl;
+      std::cerr << G_STRFUNC << "  type name: " << g_type_name(value_type) << std::endl;
     }
 
     return ret;