[glibmm] giomm: Add VariantParseError.

[Murray Cumming <murrayc src gnome org>]

commit d5c05e2c735daca98389783157859d1e2bfaff1d
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Sep 17 09:56:33 2013 +0200

    giomm: Add VariantParseError.

 glib/src/variant.hg |    8 ++++++++
 1 files changed, 8 insertions(+), 0 deletions(-)
---
diff --git a/glib/src/variant.hg b/glib/src/variant.hg
index 5cb7a1c..e7b6066 100644
--- a/glib/src/variant.hg
+++ b/glib/src/variant.hg
@@ -21,6 +21,7 @@ _DEFS(glibmm,glib)
 #include <glibmm/varianttype.h>
 #include <glibmm/variantiter.h>
 #include <glibmm/ustring.h>
+#include <glibmm/error.h>
 #include <utility>
 #include <vector>
 #include <map>
@@ -60,6 +61,13 @@ namespace Glib
  * with type inferencing.</a>.
  */
 
+//Note: So far we only wrap this because it is thrown by GtkBuilder's functions.
+// See https://bugzilla.gnome.org/show_bug.cgi?id=708206
+// It would also be thrown by parse() if we wrap g_variant_parse().
+/** Exception class for Variant parse errors.
+ */
+_WRAP_GERROR(VariantParseError, GVariantParseError, G_VARIANT_PARSE_ERROR, NO_GTYPE)
+
 //TODO: VariantBase class can be copied, so suggest how it can be dynamic casted to
 //derived types: See https://bugzilla.gnome.org/show_bug.cgi?id=644146