[FIX] ir.ui.view: allow importing views without arch_fs, for base_import_module
[FIX] ir.ui.view: allow importing views without arch_fs, for base_import_module

Data-only modules imported via base_import_module
do not have fs-backed source files, so the arch_fs
field for views should always be NULL, and the arch_db
version is always used.
Avoid crashing at arch_fs detection during import
via base_import_module.

ygol/odoo,sysadminmatmoz/OCB,mkieszek/odoo,dfang/odoo,cdrooom/odoo,laslabs/odoo,sysadminmatmoz/OCB,odoousers2014/odoo,laslabs/odoo,bplancher/odoo,sysadminmatmoz/OCB,Elico-Corp/odoo_OCB,ygol/odoo,hip-odoo/odoo,Grirrane/odoo,Grirrane/odoo,deKupini/erp,odoousers2014/odoo,bplancher/odoo,syci/OCB,tvtsoft/odoo8,hip-odoo/odoo,storm-computers/odoo,cdrooom/odoo,microcom/odoo,alhashash/odoo,odoousers2014/odoo,alhashash/odoo,laslabs/odoo,odoousers2014/odoo,Elico-Corp/odoo_OCB,sysadminmatmoz/OCB,mkieszek/odoo,deKupini/erp,addition-it-solutions/project-all,storm-computers/odoo,storm-computers/odoo,alhashash/odoo,Grirrane/odoo,syci/OCB,microcom/odoo,Grirrane/odoo,deKupini/erp,dfang/odoo,microcom/odoo,microcom/odoo,tvtsoft/odoo8,stephen144/odoo,syci/OCB,hip-odoo/odoo,bplancher/odoo,optima-ict/odoo,Elico-Corp/odoo_OCB,addition-it-solutions/project-all,optima-ict/odoo,cdrooom/odoo,ygol/odoo,dfang/odoo,ygol/odoo,tvtsoft/odoo8,cdrooom/odoo,stephen144/odoo,Elico-Corp/odoo_OCB,syci/OCB,Elico-Corp/odoo_OCB,stephen144/odoo,syci/OCB,stephen144/odoo,optima-ict/odoo,deKupini/erp,bplancher/odoo,laslabs/odoo,optima-ict/odoo,laslabs/odoo,hip-odoo/odoo,sysadminmatmoz/OCB,tvtsoft/odoo8,storm-computers/odoo,Grirrane/odoo,dfang/odoo,addition-it-solutions/project-all,alhashash/odoo,addition-it-solutions/project-all,dfang/odoo,tvtsoft/odoo8,mkieszek/odoo,ygol/odoo,bplancher/odoo,alhashash/odoo,laslabs/odoo,mkieszek/odoo,stephen144/odoo,odoousers2014/odoo,syci/OCB,addition-it-solutions/project-all,Grirrane/odoo,bplancher/odoo,hip-odoo/odoo,storm-computers/odoo,deKupini/erp,Elico-Corp/odoo_OCB,hip-odoo/odoo,tvtsoft/odoo8,microcom/odoo,alhashash/odoo,ygol/odoo,stephen144/odoo,dfang/odoo,storm-computers/odoo,optima-ict/odoo,sysadminmatmoz/OCB,mkieszek/odoo,mkieszek/odoo,addition-it-solutions/project-all,odoousers2014/odoo,optima-ict/odoo,microcom/odoo,ygol/odoo,sysadminmatmoz/OCB