Bail out if JUNIT is not enabled

Otherwise we would try to access an array element of `false`, which
issues a notice as of PHP 7.4.0.  This would happen, for instance, for
bug63447_001.phpt if CGI is not available.

diff --git a/run-tests.php b/run-tests.php
index 909a8ea9b7b9f44450c0a2b6f5507bfb917455da..5adfcd2991581e1949d32ea04cf3fab2ff76868b 100755 (executable)
--- a/run-tests.php
+++ b/run-tests.php
@@ -3504,6 +3504,8 @@ function junit_path_to_classname($file_name)
 {
        global $JUNIT;
 
+       if (!junit_enabled()) return '';
+
        $ret = $JUNIT['name'];
        $_tmp = array();