Slightly simplify the radix-detection code
Slightly simplify the radix-detection code

(pradix && pradix > sradix) etc. is unnecessary since pradix and
sradix cannot be negative, so zero is always the smallest value.

Put in a comment explaining why making the default radix == 10 doesn't
need any additional error checking.

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