[FIX] l10n_id_efaktur: fix the issue of invalid literal base10 in efaktur

If applied, this commit will solve the min-max issues for efaktur.

- invalid literal for int() with base 10: when we enter all characters
string in the min or max it will raise an error like this.

- Error is also raised when the min or max is blank and try to save the
record.

So, I have update the value as 0 if the min value or max value not
generated.

see - https://tinyurl.com/2lx9j2kr



Sentry - 3936020226

closes odoo/odoo#112850

Signed-off-by: William André (wan) <wan@odoo.com>

addons/l10n_id_efaktur/models/efaktur.py

@@ -98,12 +98,14 @@ class Efaktur(models.Model):
 
     @api.onchange('min')
     def _onchange_min(self):
-        self.min = '%013d' % int(re.sub(r'\D', '', self.min))
+        min_val = re.sub(r'\D', '', str(self.min)) or 0
+        self.min = '%013d' % int(min_val)
         if not self.max or int(self.min) > int(self.max):
             self.max = self.min
 
     @api.onchange('max')
     def _onchange_max(self):
-        self.max = '%013d' % int(re.sub(r'\D', '', self.max))
+        max_val = re.sub(r'\D', '', str(self.max)) or 0
+        self.max = '%013d' % int(max_val)
         if not self.min or int(self.min) > int(self.max):
             self.min = self.max