callsite emit in global code
callsite emit in global code

- when used in global code (Routine == null)
- correct class context in global code
- fixes nullref

iolevel/peachpie,iolevel/peachpie-concept,iolevel/peachpie-concept,iolevel/peachpie-concept,iolevel/peachpie,iolevel/peachpie,peachpiecompiler/peachpie,peachpiecompiler/peachpie,peachpiecompiler/peachpie