Handle infinite quotas when adding validators, fixes #162

(cherry picked from commit fe0b292d45)

admin/mailu/admin/views/users.py

@@ -22,6 +22,7 @@ def user_create(domain_name):
         return flask.redirect(
             flask.url_for('.user_list', domain_name=domain.name))
     form = forms.UserForm()
+    if domain.max_quota_bytes:
         form.quota_bytes.validators = [
             wtforms.validators.NumberRange(max=domain.max_quota_bytes)]
     if form.validate_on_submit():
@@ -53,6 +54,7 @@ def user_edit(user_email):
     wtforms_components.read_only(form.localpart)
     form.pw.validators = []
     form.localpart.validators = []
+    if max_quota_bytes:
         form.quota_bytes.validators = [
             wtforms.validators.NumberRange(max=max_quota_bytes)]
     if form.validate_on_submit():