Fix Random.Next returns negative numbers #405 (#840)
Fix Random.Next returns negative numbers #405 (#840)

We need to clear the first bit because rand->Next returns uint32 and the method needs to return int32.
Eclo/nf-interpreter,Eclo/nf-interpreter,Eclo/nf-interpreter,nanoframework/nf-interpreter,nanoframework/nf-interpreter,nanoframework/nf-interpreter,Eclo/nf-interpreter,nanoframework/nf-interpreter