Log Message:
Workaround for my own PR 39379:

Don't -DUSE_INLINE - this creates "static inline", and the imake setup
at least on NetBSD-4/arm calls "cc -ansi", which, as being a c89 compiler,
refuses this c99 code (or so I've been told by C language lawyers).
(Maybe somebody can come up with a patch that does the right thing
wrt. this stuff for all our environments.)