Variable-sized reg frames 2 - adapt sub and coro structure
Variable-sized reg frames 2 - adapt sub and coro structure

* make room for n_regs_used in sub structures
* remove (unused) enclosing_sub - this is dynamic, a sub can be called
  from different callers even at the same time


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@9432 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

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