fix(targetticket): prevent setting a type from an incompatible question

Author: btry

inc/targetticket.class.php

@@ -1090,6 +1090,13 @@ protected function setTargetType(array $data, PluginFormcreatorFormAnswer $forma
             ])->current();
             if (isset($type['answer']) && ctype_digit($type['answer'])) {
                $type = $type['answer'];
+            } else {
+               // Invalid value. Maybe the questin is not compatible.
+               trigger_error(sprintf("Attempt to set the type of a ticket from an incompatible question. Check the target ticket %s of the form ID=%s",
+                  $this->fields['name'],
+                  $this->getForm()->getID()
+               ));
+               $type = null;
             }
             break;
          case self::REQUESTTYPE_SPECIFIC: