Limit digit to positive integer when formatting float in domain parser

Closes #14557
(grafted from 319126552d56ef1dd8a03e457071df0d40d0607e)

--HG--
branch : 7.0

sao/src/common.js

@@ -2205,6 +2205,7 @@
                 }
                 var factor = Number(field.factor || 1);
                 digit -= Math.round(Math.log10(factor));
+                digit = Math.max(digit, 0);
                 return (value * factor).toLocaleString(
                     Sao.i18n.BC47(Sao.i18n.getlang()), {
                         useGrouping: true,

tryton/tryton/common/domain_parser.py

@@ -349,8 +349,8 @@ def format_value(field, value, target=None, context=None, _quote_empty=False):
             cast = float
         factor = cast(field.get('factor', 1))
         digit -= round(math.log10(factor))
-        return locale.localize(
-            '{0:.{1}f}'.format(value * factor or 0, digit), True)
+        digit = max(digit, 0)
+        return locale.localize('{0:.{1}f}'.format(value * factor, digit), True)
 
     def format_selection():
         if isinstance(field['selection'], (tuple, list)):