[FIX] ir.ui.view: creating custom views in backend did not compute view type

When creating new records in backend all field values are
sent to the server, including empty fields.

openerp/addons/base/ir/ir_ui_view.py

@@ -178,7 +178,7 @@ class view(osv.osv):
             cr.execute('CREATE INDEX ir_ui_view_model_type_inherit_id ON ir_ui_view (model, inherit_id)')
 
     def create(self, cr, uid, values, context=None):
-        if 'type' not in values:
+        if not values.get('type'):
             if values.get('inherit_id'):
                 values['type'] = self.browse(cr, uid, values['inherit_id'], context).type
             else: