amd64 fixes

libc/dofmt.c

@@ -333,7 +333,11 @@ __ifmt(Fmt *f)
 		break;
 	}
 	if(f->r == 'p'){
-		u = (ulong)va_arg(f->args, void*);
+		if(sizeof(void*) == sizeof(uvlong)){
+			isv = 1;
+			vu = (uvlong)va_arg(f->args, uvlong);
+		}else
+			u = (ulong)va_arg(f->args, ulong);
 		f->r = 'x';
 		fl |= FmtUnsigned;
 	}else if(fl & FmtVLong){

libc/lock.c

@@ -38,7 +38,7 @@ lock(Lock *lk)
 	for(;;) {
 		if(canlock(lk))
 			return;
-		iprint("lock loop %ld: val=%d &lock=%ux pc=%ux\n", getpid(), lk->key, lk, getcallerpc(&lk));
+		iprint("lock loop %ld: val=%d &lock=%ux pc=%p\n", getpid(), lk->key, lk, getcallerpc(&lk));
 		osmsleep(1000);
 	}
 }

libc/strtod.c

@@ -224,7 +224,7 @@ fmtstrtod(const char *as, char **aas)
 	/* close approx by naive conversion */
 	mid[0] = 0;
 	mid[1] = 1;
-	for(i=0; c=a[i]; i++) {
+	for(i=0; (c=a[i]); i++) {
 		mid[0] = mid[0]*10 + (c-'0');
 		mid[1] = mid[1]*10;
 		if(i >= 8)