FIX: many bugs and issues fixed for objects usage inside a function context.
FIX: runtime dynamic functions arity calculation wrong for empty spec blocks.
FIX: shortcut launching path for dynamic functions with zero arity was not setting the stack rightly.
FIX: non-passing objects tests when wrapped in a function.
FIX: removed code cleaning corrupted NONE from relocation tables.
FIX: inlined `fetch-into` in `comp-block` in order to allow the deeply nested object tests to pass.

This is a poor's man workaround for the memory corruptions happening in Rebol2 when running the Red/System compiler on deeply nested expressions (e.g. at least 15 levels of EITHER).
FIX: removed old code commented leftover.
FIX: wrong cleanup code for `obj-stack` word.
Merge branch 'objects' of github.com:red/red into objects