Fix for bug 126214 (peterv broke XSLT system-property function). r=sicking, sr=jst.

content/xslt/src/xslt/txSystemPropertyFunctionCall.cpp

@@ -39,7 +39,7 @@ ExprResult* SystemPropertyFunctionCall::evaluate(Node* context, ContextState* cs
             exprResult->stringValue(property);
             if (XMLUtils::isValidQName(property)) {
                 String propertyNsURI, prefix;
-                XMLUtils::getLocalPart(property, prefix);
+                XMLUtils::getPrefix(property, prefix);
                 cs->getNameSpaceURIFromPrefix(prefix, propertyNsURI);
                 if (propertyNsURI.isEqual(XSLT_NS)) {
                     String localName;