Fix NULL pointer dereference in cursor renderer

This is fixes the same issue as !3257 (closed) but slightly more correct by making all views behave exaclty the same way. While !3257 (closed) avoids the crash, it made the first view being handled differently from the others, which is a bit unfortunate. This approach makes all views have the same semantics when it comes to the validity of the view object holding cursor related state.