Okay, this one should actually work as advertised.  Pardon the mental
meltdown earlier.

This also changes "extern inline" to "static inline" (per Linus' request)
and always ignores the bigendian part of a bi-endian datum (per Tim
Riker's observation that lots of [Windoze?] programs get that wrong.)

It's still a bit of a loss to have to do unaligned load and endianness
conversion as two operations; on some machines it's doubtlessly faster to
do both at the same time.  However, *those* macros I didn't find...

	-hpa