[FIX] crm: opportunities button in partner form only count opportunities

Before, all crm.lead of the partner were counted, whatever it was a lead or an opportunity, but the button opens the opportunity tree, which has a domain type = opportunity. So leads were not displayed, and the count was therefore misleading.

Besides, the button is called "Opportunities", and it was misleading to count leads for a button with such a name

addons/crm/res_partner.py

@@ -30,8 +30,9 @@ class res_partner(osv.osv):
         # the user may not have access rights for opportunities or meetings
         try:
             for partner in self.browse(cr, uid, ids, context):
+                opp_ids = self.pool['crm.lead'].search(cr, uid, [('partner_id', '=', partner.id), ('type', '=', 'opportunity'), ('probability', '<', '100')], context=context)
                 res[partner.id] = {
-                    'opportunity_count': len(partner.opportunity_ids),
+                    'opportunity_count': len(opp_ids),
                     'meeting_count': len(partner.meeting_ids),
                 }
         except: