[FIX] case where Root's dispatcher finds a non-exposed method
[FIX] case where Root's dispatcher finds a non-exposed method

Using elif, if a method was found but not exposed (because
internal/whatever) the controller's index method would be skipped
during URL dispatch leading to a 404.

Since matched method yields an early return, a simple if will work,
and will *not* skip case where ``method and not method.exposed``

splbio/openerp-web,MarkusTeufelberger/openerp-web,splbio/openerp-web,MarkusTeufelberger/openerp-web,splbio/openerp-web,MarkusTeufelberger/openerp-web