The previous version of PSVIUni.hpp had a XERCES_CPP_NAMESPACE_USE that is needed

git-svn-id: https://svn.apache.org/repos/asf/xerces/c/trunk@464581 13f79535-47bb-0310-9956-ffa450edef68

swig/interfaces/includes.i

@@ -60,5 +60,8 @@
 #include "xercesc/validators/schema/SchemaAttDef.hpp"
 
 #include "xercesc/util/PSVIUni.hpp"
+
+XERCES_CPP_NAMESPACE_USE
+
 %}