(I'm a fan of local macros (#define/#undef inside a function), but
that's inappropriate for Emacs, it seems.  Hmm, i see one other call to
‘XftCharExists’ in that file, so maybe a top-level macro is warranted.)
Also, although we could use ‘(FcChar32) c’ as third arg, that's probably
not a good idea; better to let callers cast if need be.

-- 
Thien-Thi Nguyen
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