Fix Fiscal Regimen validation when generating and invoice

At commit d8242f34 the validation for fiscal regimen data on company
were incorrect idented causing an invoice without fiscal regimen
gets into the PAC signing process generating a "Invalid XML" error.

l10n_mx_facturae/models/account_invoice.py

@@ -343,7 +343,7 @@ class account_invoice(osv.Model):
             'no_certificado': False,
             'certificado': False,
             'sello': False,
-            'cadena_original': False,      
+            'cadena_original': False,
             'cfdi_cbb': False,
             'cfdi_sello': False,
             'cfdi_no_certificado': False,
@@ -408,7 +408,7 @@ class account_invoice(osv.Model):
                 key_node.appendChild(text_node)
                 new_node.appendChild(key_node)
         parent_node.appendChild(new_node)
-        return new_node  
+        return new_node
 
     def _get_type_sequence(self, cr, uid, ids, context=None):
         if context is None:
@@ -421,7 +421,7 @@ class account_invoice(osv.Model):
         if sequence_app_id:
             type_inv = ir_seq_app_obj.browse(
                 cr, uid, sequence_app_id[0], context=context).type
-        if 'cfdi32' in type_inv: # Revisa si en tipo es cfdi
+        if 'cfdi32' in type_inv:  # Revisa si en tipo es cfdi
             comprobante = 'cfdi:Comprobante'
         else:
             comprobante = 'Comprobante'
@@ -1287,12 +1287,12 @@ class account_invoice(osv.Model):
                   'voucher is complete (City - State - Country)')
             )
 
-            if not invoice.company_id.partner_id.regimen_fiscal_id.name:
-                raise osv.except_osv(
-                    _('Missing Fiscal Regime!'),
-                    _('The Fiscal Regime of the company issuing of fiscal '
-                      'voucher is a data required')
-                )
+        if not invoice.company_id.partner_id.regimen_fiscal_id.name:
+            raise osv.except_osv(
+                _('Missing Fiscal Regime!'),
+                _('The Fiscal Regime of the company issuing invoice '
+                  'is required')
+            )
 
         invoice_data_parents[0]['Comprobante'][
             'xsi:schemaLocation'] = 'http://www.sat.gob.mx/cfd/2 http://www.sat.gob.mx/sitio_internet/cfd/2/cfdv22.xsd'