Modify img src att for curtlery

lacagette_addons/pos_meal_voucher/static/src/xml/pos_meal_voucher.xml

@@ -111,13 +111,13 @@
     <t t-extend="XmlReceipt"> <!-- Ticket sent to the printer -->
         <t t-jquery="div.orderlines line:not([indent]) left" t-operation="prepend"> <!-- hack to get product name line (lines with qty have 'indent' attr) -->
             <t t-if='receipt.meal_voucher_used === true and line.product_meal_voucher_ok === true'>
-                <img src="receipt.curtlery_img_src" alt="#" />
+                <img t-att-src="receipt.curtlery_img_src" t-att-alt="#"/>
             </t>
         </t>
         <t t-jquery="div.orderlines" t-operation="after">
             <t t-if="receipt.meal_voucher_used === true">
                 <line><right>--------</right></line>
-                <line><left><img src="receipt.curtlery_img_src" alt="#" /> Eligible subtotal for</left></line>
+                <line><left><img t-att-src="receipt.curtlery_img_src" t-att-alt="#" /> Eligible subtotal for</left></line>
                 <line>
                     <left>meal vouchers:</left>
                     <right><value t-att-value-decimals='pos.currency.decimals'><t t-esc='receipt.total_meal_voucher_eligible' /></value></right>