erp5_advanced_ecommerce: fix

bt5/erp5_advanced_ecommerce/SkinTemplateItem/portal_skins/erp5_advanced_ecommerce/WebSection_viewLoyaltyWidgetRenderer.zpt

 <tal:block tal:define="isAnon here/portal_membership/isAnonymousUser">
   <tal:block tal:condition="not: isAnon"
-             tal:define="customer here/portal_membership/getAuthenticatedMember/getUserValue;
+             tal:define="customer python: here.portal_membership.getAuthenticatedMember().getUserValue();
                          login customer/getReference | string: ;
                          website here/getWebSiteValue">
 

bt5/erp5_advanced_ecommerce/SkinTemplateItem/portal_skins/erp5_advanced_ecommerce/WebSite_viewStandardLoginWidgetRenderer.zpt

@@ -29,7 +29,7 @@
    </tal:block>
 
   <tal:block tal:condition="not: isAnon"
-             tal:define="customer here/portal_membership/getAuthenticatedMember/getUserValue;
+             tal:define="customer python: here.portal_membership.getAuthenticatedMember().getUserValue();
                          login customer/getReference | string: ;
                          website here/getWebSiteValue">