Simplified tre_expand_macro.
Simplified tre_expand_macro.

This avoids using btowc() which doesn't seem to exist on HP-UX 11.00
and makes the code a lot simpler.

darcs-hash:20060521071233-ced27-66e19e9f399ae5f80f3b1770baedfec9b27f640f.gz

amlweems/tre,amlweems/tre,amlweems/tre,laurikari/tre,laurikari/tre,laurikari/tre