Ignore xmlRelaxNGParse() memory leaks

`xmlRelaxNGParse()` calls `xmlRelaxNGInitTypes()` and that allocates
memory. libxml2 recommends to call `xmlCleanupParser()` to free this
memory, but we don't call this function for reasons.

Author: cmb69

ext/dom/document.c

@@ -2023,7 +2023,9 @@ static void dom_document_relaxNG_validate(INTERNAL_FUNCTION_PARAMETERS, int type
 		(xmlRelaxNGValidityErrorFunc) php_libxml_error_handler,
 		(xmlRelaxNGValidityWarningFunc) php_libxml_error_handler,
 		parser);
+	ZEND_IGNORE_LEAKS_BEGIN();
 	sptr = xmlRelaxNGParse(parser);
+	ZEND_IGNORE_LEAKS_END();
 	xmlRelaxNGFreeParserCtxt(parser);
 	PHP_LIBXML_RESTORE_GLOBALS(parse);
 	if (!sptr) {

ext/xmlreader/php_xmlreader.c

@@ -334,7 +334,10 @@ static xmlRelaxNGPtr _xmlreader_get_relaxNG(char *source, size_t source_len, siz
 			(xmlRelaxNGValidityWarningFunc) warn_func,
 			parser);
 	}
+	ZEND_IGNORE_LEAKS_BEGIN();
 	sptr = xmlRelaxNGParse(parser);
+	ZEND_IGNORE_LEAKS_END();
+	
 	xmlRelaxNGFreeParserCtxt(parser);
 	PHP_LIBXML_RESTORE_GLOBALS(parse);