Player sometimes gets stuck when walking over props

[mikkokko]

The player occasionally gets stuck when trying to walk onto certain props, e.g. trims in CS:GO's old de_dust2 and models/props/de_prodigy/pushcart.mdl in CS:S. Setting ShapeCastSettings::mUseShrunkenShapeAndConvexRadius to false in CastBoxVsShape fixes this.