Fix company context domain when company is not in context

(transplanted from c9ac47a6fea863c54cb8501a22564a3e5b519628)

fiscalyear.py

@@ -36,7 +36,8 @@ class FiscalYear(ModelSQL, ModelView):
                     context="{'code': 'account.move', 'company': company}",
             depends=['company'])
     company = fields.Many2One('company.company', 'Company', required=True,
-            domain=["('id', '=', context.get('company', False))"])
+            domain=["('id', 'company' in context and '=' or '!=', " \
+                    "context.get('company', 0))"])
 
     def __init__(self):
         super(FiscalYear, self).__init__()

tax.py

@@ -616,7 +616,8 @@ class Tax(ModelSQL, ModelView):
     parent = fields.Many2One('account.tax', 'Parent', ondelete='CASCADE')
     childs = fields.One2Many('account.tax', 'parent', 'Children')
     company = fields.Many2One('company.company', 'Company', required=True,
-            domain=["('id', '=', context.get('company', 0))"])
+            domain=["('id', 'company' in context and '=' or '!=', " \
+                    "context.get('company', 0))"])
     invoice_account = fields.Many2One('account.account', 'Invoice Account',
             domain=["('company', '=', company)",
                     ('kind', '!=', 'view')],
@@ -1043,7 +1044,8 @@ class Rule(ModelSQL, ModelView):
     _description = __doc__
     name = fields.Char('Name', required=True, translate=True)
     company = fields.Many2One('company.company', 'Company', required=True,
-            select=1, domain=["('id', '=', context.get('company', 0))"])
+            select=1, domain=["('id', 'company' in context and '=' or '!=', " \
+                    "context.get('company', 0))"])
     lines = fields.One2Many('account.tax.rule.line', 'rule', 'Lines')
     template = fields.Many2One('account.tax.rule.template', 'Template')