preproc.c: fix tokenize() warnings for ignored expansion definitions
preproc.c: fix tokenize() warnings for ignored expansion definitions

turingstudio/nasm,techkey/nasm,letolabs/nasm,Distrotech/nasm,Distrotech/nasm,Distrotech/nasm,projedi/nasm,projedi/nasm,projedi/nasm,turingstudio/nasm,Distrotech/nasm,turingstudio/nasm,projedi/nasm,turingstudio/nasm,letolabs/nasm,techkey/nasm,projedi/nasm,techkey/nasm,techkey/nasm,letolabs/nasm,techkey/nasm