minor: unused variable warning

silence the compiler

alib/src/sax/SaxInterface.cpp

@@ -65,6 +65,8 @@ void SaxInterface::characters(void * userData, const xmlChar * ch, int len) {
 }
 void SaxInterface::startElement(void* userData, const xmlChar* name, const xmlChar** attrs) {
+	(void)attrs;
+
 	list<Token> &out = *((list<Token>*) userData);
 	out.push_back(Token((char*) name, Token::START_ELEMENT));
 }