Use number for select on fields

trytond/ir/export.py

@@ -22,6 +22,6 @@ class ExportLine(OSV):
     _description = __doc__
     name = fields.Char('Field name', size=64)
     export = fields.Many2One('ir.export', 'Exportation',
-       select=True)
+       select=1)
 
 ExportLine()

trytond/ir/model.py

@@ -33,7 +33,7 @@ class ModelField(OSV):
     name = fields.Char('Name', required=True)
     relation = fields.Char('Model Relation')
     model = fields.Many2One('ir.model', 'Model', required=True,
-       select=True, ondelete='cascade')
+       select=1, ondelete='cascade')
     field_description = fields.Char('Field Description',
        translate=True)
     ttype = fields.Char('Field Type')