preproc: a negative number is actually two tokens
preproc: a negative number is actually two tokens

A negative number is two tokens: a minus sign and a positive
number. For most uses we still want to generate signed numbers; for
specific uses there might be motivation for an unsigned output, but in
most cases it would be confusing.

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

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