Fix for exception due to inacceptable combination mission - driving pool.
Fix for exception due to inacceptable combination mission - driving pool.

Martin-Jonasse/sfitixi,hertus/sfitixi,Martin-Jonasse/sfitixi,hertus/sfitixi,TIXI24/sfitixi,TIXI24/sfitixi,TIXI24/sfitixi,TIXI24/sfitixi,hertus/sfitixi,Martin-Jonasse/sfitixi,hertus/sfitixi