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.

1 files changed, 2 insertions, 0 deletions

diff --git a/run-tests.php b/run-tests.php
index 909a8ea9b7..5adfcd2991 100755
--- 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();