<?xml version="1.0" encoding="utf-8"?>
<openerp>
<data>

        <!-- Customer Payment -->
        <record model="ir.ui.view" id="view_vendor_receipt_form">
            <field name="name">account.voucher.receipt.form</field>
            <field name="model">account.voucher</field>
            <field name="inherit_id" ref="account_voucher.view_vendor_receipt_form"></field>
            <field name="arch" type="xml">
                <xpath expr="/form/sheet/notebook/page/field[@name='line_cr_ids']/tree/field[@name='amount_original']" position="before">
                    <field name="document_source" />
                </xpath>
            </field>
        </record>
    </data>
</openerp>

<?xml version="1.0" encoding="utf-8"?>
<openerp>
    <data>
        <!-- Customer Payment -->
        <record model="ir.ui.view" id="view_vendor_receipt_form">
            <field name="name">account.voucher.receipt.form</field>
            <field name="model">account.voucher</field>
            <field name="inherit_id" ref="account_voucher.view_vendor_receipt_form"></field>
            <field name="arch" type="xml">
                <xpath expr="//field[@name='line_cr_ids']/tree/field[@name='amount_original']" position="before">
                    <field name="document_source" />
                </xpath>
            </field>
        </record>
    </data>
</openerp>

Reduce the xpath rule and fix ident
Reduce the xpath rule and fix ident
