rdfload: make the base addresses unsigned
rdfload: make the base addresses unsigned

Make the base addresses in rdfload unsigned.  Note: this file is
really obsolete; it can't represent RDF2 with more than the 3
old-style segments.

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

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