Updates to a number of apps to remove warnings/compile errors under libc5.
Tested under both libc5 and libc6 and all seems well with these fixes.
 -Erik
diff --git a/util-linux/mkswap.c b/util-linux/mkswap.c
index 7d76916..fc37368 100644
--- a/util-linux/mkswap.c
+++ b/util-linux/mkswap.c
@@ -469,5 +469,5 @@
 	 */
 	if (fsync(DEV))
 		die("fsync failed");
-	exit(TRUE);
+	return(TRUE);
 }