Add const qualifier to getDocumentLocations to match interface (patch to...

Add const qualifier to getDocumentLocations to match interface (patch to 191040 for bug XERCESC-1153).

git-svn-id: https://svn.apache.org/repos/asf/xerces/c/trunk@191052 13f79535-47bb-0310-9956-ffa450edef68

src/xercesc/framework/psvi/XSNamespaceItem.cpp

@@ -206,7 +206,7 @@ XSNotationDeclaration *XSNamespaceItem::getNotationDeclaration(const XMLCh *name
     return 0;
 }
 
-StringList *XSNamespaceItem::getDocumentLocations()
+const StringList *XSNamespaceItem::getDocumentLocations()
 {
     if (fGrammar)
         return ((XMLSchemaDescriptionImpl*) fGrammar->getGrammarDescription())->getLocationHints();