FIX lxml error in validation

Author: gigidn

PyFePA/xsd/fatturapa_v1.2.xsd

@@ -4,7 +4,7 @@
 	xmlns="http://ivaservizi.agenziaentrate.gov.it/docs/xsd/fatture/v1.2" 
 	targetNamespace="http://ivaservizi.agenziaentrate.gov.it/docs/xsd/fatture/v1.2" 
 	version="1.2">
-  <xs:import namespace="http://www.w3.org/2000/09/xmldsig#" schemaLocation="http://www.w3.org/TR/2002/REC-xmldsig-core-20020212/xmldsig-core-schema.xsd" />
+  <xs:import namespace="http://www.w3.org/2000/09/xmldsig#" schemaLocation="xmldsig-core-schema.xsd" />
 
   <xs:element name="FatturaElettronica" type="FatturaElettronicaType">
     <xs:annotation>