fix asm for 64bit

Reference: /n/atom/patch/applied/acidasm64
Date: Tue Feb 18 23:40:11 CET 2014
Signed-off-by: quanstro@quanstro.net

--- /sys/lib/acid/port	Tue Feb 18 23:40:07 2014
+++ /sys/lib/acid/port	Tue Feb 18 23:40:08 2014
@@ -393,7 +393,7 @@
 
 	addr = fmt(addr, 'i');
 	loop 1,_asmlines do {
-		print(fmt(addr, 'a'), " ", fmt(addr, 'X'));		// sic. avoid A's 0s.
+		print(fmt(addr, 'a'), " ", fmt(addr, 'W'));		// avoid A's 0s.
 		print("\t", @addr++, "\n");
 		if bound != {} && addr > bound[1] then {
 			lasmaddr = addr;