Module 'purchase_requisition_line_analytic' should not really depend on 'account_analytic_plans'

Should only depend on 'account_analytic'. The dependence on 'account_analytic_plans' installs this module, which can be a problem for companies that really don't use it.

If purchase requisitions should really make use of analytic plans, then I suggest a new module on top of the existing called 'purchase_requisition_line_analytic_plan'.

Regards,
Jordi.