libxtables: use const for vars holding literals

Signed-off-by: Jan Engelhardt <jengelh@medozas.de>

diff --git a/include/xtables.h.in b/include/xtables.h.in
index 6712aac03dbc7835c243e9f37f2508764453e6c2..ae1594a65a68c3ad148838fac0dd6d5186697821 100644 (file)
--- a/include/xtables.h.in
+++ b/include/xtables.h.in
@@ -186,8 +186,7 @@ enum xtables_exittype {
 struct xtables_globals
 {
        unsigned int option_offset;
-       char *program_version;
-       char *program_name;
+       const char *program_name, *program_version;
        struct option *opts;
        void (*exit_err)(enum xtables_exittype status, const char *msg, ...) __attribute__((noreturn, format(printf,2,3)));
 };