[BUGFIX] Check if validationrules are set before foreach statement

The ValidationUtility now checks if there are any rules set,
before trying to use the variable in the foreach loop.

Resolves: #66508
Releases: master, 6.2
Change-Id: I201986d88666d8de8a84de6581d2ea06da7374c2
Reviewed-on: http://review.typo3.org/38846


Reviewed-by: Markus Klein <klein.t3@reelworx.at>
Tested-by: Markus Klein <klein.t3@reelworx.at>

typo3/sysext/form/Classes/Utility/ValidatorUtility.php

@@ -116,7 +116,7 @@ class ValidatorUtility implements \TYPO3\CMS\Core\SingletonInterface {
 		$this->errors[$prefix] = array();
 		$result = TRUE;
 		if (is_array($this->rules[$prefix])) {
-				foreach ($this->rules[$prefix] as $key => $element) {
+			foreach ($this->rules[$prefix] as $key => $element) {
 				/* @var $rule AbstractValidator */
 				$rule = $element['instance'];
 				$fieldName = $element['fieldName'];