[FIX] stock: allow creating a scrap with more than 2 decimals in qty

scrap_qty field was missing the digits attribute, and therefore the user
could not create a scrap with a quantity with more than two decimal places.
With this commit, scrap_qty will follow the 'Product Unit of Measure'
precision setting, just like any other quantity fields.

closes odoo/odoo#77652

Signed-off-by: William Henrotin <Whenrow@users.noreply.github.com>

addons/stock/models/stock_scrap.py

@@ -4,6 +4,7 @@
 from odoo import api, fields, models, _
 from odoo.exceptions import UserError
 from odoo.tools import float_compare
+from odoo.addons import decimal_precision as dp
 
 
 class StockScrap(models.Model):
@@ -48,7 +49,7 @@ class StockScrap(models.Model):
     scrap_location_id = fields.Many2one(
         'stock.location', 'Scrap Location', default=_get_default_scrap_location_id,
         domain="[('scrap_location', '=', True)]", required=True, states={'done': [('readonly', True)]})
-    scrap_qty = fields.Float('Quantity', default=1.0, required=True, states={'done': [('readonly', True)]})
+    scrap_qty = fields.Float('Quantity', default=1.0, required=True, states={'done': [('readonly', True)]}, digits=dp.get_precision('Product Unit of Measure'))
     state = fields.Selection([
         ('draft', 'Draft'),
         ('done', 'Done')], string='Status', default="draft")