Some "if then else" instead of orb and andb, in order to vm_compute lazily
Some "if then else" instead of orb and andb, in order to vm_compute lazily

Extraction is unchanged, since orb/andb are detected as un-strict
functions and inlined. This only prevents the use of some potential
clever Extract Inlined Constant andb => "(&&)" and idem for orb, but
this isn't a big deal.



git-svn-id: 44dc50bdcc0f5d1a212c497508dc9452e0b35e2b@10705 85f007b7-540e-0410-9357-904b9bb8a0f7

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