Fixed scene becomming white when NaN passed to node`s pos.
Fixed scene becomming white when NaN passed to node`s pos.

danilaml/qreal,dvvrd/qreal,RomanBelkov/qreal,anastasia143/qreal,RomanBelkov/qreal,anastasia143/qreal,qreal/qreal,tara-sova/qreal,tara-sova/qreal,anastasia143/qreal,DenisKogutich/qreal,qreal/qreal,Julia-Khramyshkina/qreal,dvvrd/qreal,DenisKogutich/qreal,dvvrd/qreal,Victor-Y-Fadeev/qreal,ZiminGrigory/qreal,qreal/qreal,qreal/qreal,anastasia143/qreal,ZiminGrigory/qreal,RomanBelkov/qreal,Ashatta/qreal,dvvrd/qreal,Julia-Khramyshkina/qreal,ZiminGrigory/qreal,dvvrd/qreal,danilaml/qreal,anastasia143/qreal,danilaml/qreal,tara-sova/qreal,tara-sova/qreal,RomanBelkov/qreal,anastasia143/qreal,tara-sova/qreal,qreal/qreal,Ashatta/qreal,Victor-Y-Fadeev/qreal,ZiminGrigory/qreal,Ashatta/qreal,dvvrd/qreal,danilaml/qreal,tara-sova/qreal,danilaml/qreal,Julia-Khramyshkina/qreal,danilaml/qreal,dvvrd/qreal,Ashatta/qreal,RomanBelkov/qreal,Ashatta/qreal,Victor-Y-Fadeev/qreal,Julia-Khramyshkina/qreal,DenisKogutich/qreal,dvvrd/qreal,Victor-Y-Fadeev/qreal,qreal/qreal,danilaml/qreal,qreal/qreal,ZiminGrigory/qreal,Julia-Khramyshkina/qreal,tara-sova/qreal,Victor-Y-Fadeev/qreal,DenisKogutich/qreal,DenisKogutich/qreal,Ashatta/qreal,Victor-Y-Fadeev/qreal,ZiminGrigory/qreal,RomanBelkov/qreal,DenisKogutich/qreal,qreal/qreal,ZiminGrigory/qreal,DenisKogutich/qreal,Ashatta/qreal,ZiminGrigory/qreal,RomanBelkov/qreal,Julia-Khramyshkina/qreal,danilaml/qreal,Ashatta/qreal,RomanBelkov/qreal,Julia-Khramyshkina/qreal,dvvrd/qreal,DenisKogutich/qreal,ZiminGrigory/qreal,tara-sova/qreal,Victor-Y-Fadeev/qreal,Ashatta/qreal,tara-sova/qreal,anastasia143/qreal,Julia-Khramyshkina/qreal,Victor-Y-Fadeev/qreal,danilaml/qreal,RomanBelkov/qreal,DenisKogutich/qreal,anastasia143/qreal,anastasia143/qreal,Julia-Khramyshkina/qreal,qreal/qreal