- Move the field access behind the check

# Only called from one place where the connection is checked, but
# playing safe, again (parfait)

ext/mysqlnd/mysqlnd_wireprotocol.c

@@ -2380,11 +2380,10 @@ mysqlnd_protocol_init(zend_bool persistent TSRMLS_DC)
 PHPAPI void
 mysqlnd_protocol_free(MYSQLND_PROTOCOL * const protocol TSRMLS_DC)
 {
-	zend_bool pers = protocol->persistent;
-
 	DBG_ENTER("mysqlnd_protocol_free");
 
 	if (protocol) {
+		zend_bool pers = protocol->persistent;
 		mnd_pefree(protocol, pers);
 	}
 	DBG_VOID_RETURN;