N°3430 - code cleanup

- during the code review @dflaven preferred the reference rather than the return alternative
 - typo

sources/form/formmanager.class.inc.php

@@ -175,7 +175,7 @@ abstract class FormManager
 			),
 		);
 
-		$aData = $this->CheckTransaction($aData);
+		$this->CheckTransaction($aData);
 
 		return $aData;
 	}
@@ -187,7 +187,7 @@ abstract class FormManager
 	 *
 	 * @since 2.7.4 3.0.0 N°3430
 	 */
-	public function CheckTransaction($aData)
+	public function CheckTransaction(&$aData)
 	{
 		$isTransactionValid = \utils::IsTransactionValid($this->oForm->GetTransactionId(), false); //The transaction token is kept in order to preserve BC with ajax forms (the second call would fail if the token is deleted). (The GC will take care of cleaning the token for us later on)
 		if (!$isTransactionValid) {
@@ -196,8 +196,6 @@ abstract class FormManager
 			];
 			$aData['valid'] = false;
 		}
-
-		return $aData;
 	}
 
 	/**