[pybank] Not all wrapped types have a gtype

[Johan Dahlin <johan src gnome org>]

commit de853594cf731d7d450fb73c3434f1da4409d575
Author: Tomeu Vizoso <tomeu sugarlabs org>
Date:   Fri May 22 18:30:12 2009 +0200

    Not all wrapped types have a gtype
---
 bank/btypes.py |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)

diff --git a/bank/btypes.py b/bank/btypes.py
index bf637a2..7fe0c50 100644
--- a/bank/btypes.py
+++ b/bank/btypes.py
@@ -195,7 +195,8 @@ class PyBankMeta(gobject.GObjectMeta):
         if hasattr(cls.__info__, 'getFields'):
             cls._setup_fields()
 
-        repo.setObjectHasNewConstructor(cls.__gtype__)
+        if hasattr(cls, '__gtype__'):
+            repo.setObjectHasNewConstructor(cls.__gtype__)
 
     def _setup_methods(cls, needs_constructor):
         info = cls.__info__