Autoloading doesn't require an actual value.
Whenever a value faults, load the object, then try again.
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Changes:
+30 -52 omake-jumbo-branches/var3/0.9.8.x/src/env/omake_env.ml
A hyperlinked version of this commit is available at
http://svn.metaprl.org/commitlogs/omake/2007-03.html#07/03/20.18:26:57