Fixed crash when trying to view goal model with empty association label(s)
Fixed crash when trying to view goal model with empty association label(s)

RobinQuetin/CAIRIS-web,nathanbjenx/cairis,failys/CAIRIS,RobinQuetin/CAIRIS-web,failys/CAIRIS,RobinQuetin/CAIRIS-web,nathanbjenx/cairis,nathanbjenx/cairis,failys/CAIRIS,nathanbjenx/cairis