tools/nolibc: sys: avoid implicit sign cast

getauxval() returns an unsigned long but the overall type of the ternary
operator needs to be signed.
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>

tools/include/nolibc/sys.h

@@ -466,7 +466,7 @@ static unsigned long getauxval(unsigned long key);
 static __attribute__((unused))
 int getpagesize(void)
 {
-	return __sysret(getauxval(AT_PAGESZ) ?: -ENOENT);
+	return __sysret((int)getauxval(AT_PAGESZ) ?: -ENOENT);
 }