[PATCH] wavefront_fx.c build fix

With gcc from CVS:

sound/isa/wavefront/wavefront_fx.c:697: error: static declaration of 'page_zero' follows non-static declaration
include/sound/yss225.h:4: error: previous declaration of 'page_zero' was here
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>