nasmlib.h: add nasm_zeron()
nasmlib.h: add nasm_zeron()

Add a nasm_zeron() convenience macro to match nasm_zero(); compare
nasm_new() vs nasm_newn().

Signed-off-by: H. Peter Anvin <8a453bad9912ffe59bc0f0b8abe03df9be19379e@zytor.com>

techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm,techkey/nasm