fix(targetticket,targetchange): return value of save() method

Author: btry

inc/formanswer.class.php

@@ -1081,7 +1081,7 @@ public function generateTarget() {
          $targetObject = new $target['itemtype'];
          $targetObject->getFromDB($target['items_id']);
          $generatedTarget = $targetObject->save($this);
-         if ($generatedTarget === false) {
+         if ($generatedTarget === null) {
             $success = false;
             break;
          }

inc/targetchange.class.php

@@ -932,7 +932,7 @@ public function prepareInputForUpdate($input) {
     *
     * @param  PluginFormcreatorFormAnswer $formanswer    Answers previously saved
     *
-    * @return Change|false generated change
+    * @return Change|null generated change
     */
    public function save(PluginFormcreatorFormAnswer $formanswer) {
       global $DB;
@@ -1031,7 +1031,7 @@ public function save(PluginFormcreatorFormAnswer $formanswer) {
 
       // Create the target change
       if (!$changeID = $change->add($data)) {
-         return false;
+         return null;
       }
 
       // Add tag if presents

inc/targetticket.class.php

@@ -1046,7 +1046,7 @@ public function pre_deleteItem() {
     *
     * @param  PluginFormcreatorFormAnswer $formanswer    Answers previously saved
     *
-    * @return Ticket|false Generated ticket if success, null otherwise
+    * @return Ticket|null Generated ticket if success, null otherwise
     */
    public function save(PluginFormcreatorFormAnswer $formanswer) {
       global $DB, $CFG_GLPI;