Use ModelValidator::count() to count dynamiclly added validation rules

lib/Cake/View/Helper/FormHelper.php

@@ -218,7 +218,7 @@ protected function _introspectModel($model, $key, $field = null) {
 
 		if ($key === 'validates' && !isset($this->fieldset[$model]['validates'])) {
 			$validates = array();
-			if (!empty($object->validate)) {
+			if ($object->validator()->count() > 0) {
 				foreach ($object->validator() as $validateField => $validateProperties) {
 					if ($this->_isRequiredField($validateProperties)) {
 						$validates[$validateField] = true;