xz: Fix use of wrong variable.
Since the only call to suffix_set() uses optarg
as the argument, fixing this bug doesn't change
the behavior of the program.
diff --git a/src/xz/suffix.c b/src/xz/suffix.c
index e515626..9d4fcd1 100644
--- a/src/xz/suffix.c
+++ b/src/xz/suffix.c
@@ -390,7 +390,7 @@
// Empty suffix and suffixes having a directory separator are
// rejected. Such suffixes would break things later.
if (suffix[0] == '\0' || has_dir_sep(suffix))
- message_fatal(_("%s: Invalid filename suffix"), optarg);
+ message_fatal(_("%s: Invalid filename suffix"), suffix);
// Replace the old custom_suffix (if any) with the new suffix.
free(custom_suffix);
