Use 'unsigned int' instead of bare 'unsigned'
Use 'unsigned int' instead of bare 'unsigned'

To make it more explict, and in line with the rest of our code.

Contributes to issue CURA-3862.

ROBO3D/CuraEngine,alephobjects/CuraEngine,alephobjects/CuraEngine,Ultimaker/CuraEngine,ROBO3D/CuraEngine,alephobjects/CuraEngine,ROBO3D/CuraEngine,Ultimaker/CuraEngine