Do not crash if there is no Euro currency defined for intrastat reports

Closes #14050
(grafted from 8b44253eff407832523cbb9e023955ee5c4a4ba9)

--HG--
branch : 7.0

modules/account_stock_eu/company.py

@@ -24,7 +24,10 @@ class Company(metaclass=PoolMeta):
                 currency = company.currency
             else:
                 if not eur:
-                    eur, = Currency.search([('code', '=', 'EUR')], limit=1)
+                    try:
+                        eur, = Currency.search([('code', '=', 'EUR')], limit=1)
+                    except ValueError:
+                        pass
                 currency = eur
             currencies[company.id] = currency
         return currencies

modules/account_stock_eu/stock.py

@@ -418,7 +418,7 @@ class Move(metaclass=PoolMeta):
                 return round(Currency.compute(
                         self.currency,
                         self.unit_price * Decimal(str(self.quantity)),
-                        self.company.intrastat_currency,
+                        self.company.intrastat_currency or self.currency,
                         round=False), ndigits)
 
     def _intrastat_quantity(self, unit):