[FIX] account: Fix amount_total_signed in account.move
[FIX] account: Fix amount_total_signed in account.move

The miscalleneous journal entries has displayed in the tree view with
a negative amount in amount_total_signed that has no meaning.

X-original-commit: 4a7dcb4027ee93448b2d15cc262b8c2fb5d531db
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo