type cast to int so no other content could be set

Author: Fasse

adm_program/modules/ecards/ecard_send.php

@@ -92,7 +92,7 @@
             $arrayRoles[] = $roleId;
         }
     } else {
-        $arrayUsers[] = $value;
+        $arrayUsers[] = (int) $value;
     }
 }