a) ALSA variant of wavefront didn't compile on gcc 2.x with debugging
turned on - authors heard something about variadic macros on gcc 2.x,
but screwed it up.  Fixed.
b) au88x0 relied on char being signed in non-trivial ways.  On ppc it's
not true.  Fixed by explicit use of s8 (which is what that code really
wants).
Signed-off-by: Linus Torvalds <torvalds@osdl.org>