checkout: constify parameters of checkout_stage() and checkout_merged()

Document the fact that checkout_stage() and checkout_merged() don't
change the objects passed to them by adding the modifier const.

Signed-off-by: Rene Scharfe <l.s.r@web.de>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/builtin/checkout.c b/builtin/checkout.c
index efcbd8f..161f163 100644 (file)
--- a/builtin/checkout.c
+++ b/builtin/checkout.c
@@ -154,8 +154,8 @@ static int check_stages(unsigned stages, const struct cache_entry *ce, int pos)
        return 0;
 }
 
-static int checkout_stage(int stage, struct cache_entry *ce, int pos,
-                         struct checkout *state)
+static int checkout_stage(int stage, const struct cache_entry *ce, int pos,
+                         const struct checkout *state)
 {
        while (pos < active_nr &&
               !strcmp(active_cache[pos]->name, ce->name)) {
@@ -169,7 +169,7 @@ static int checkout_stage(int stage, struct cache_entry *ce, int pos,
                return error(_("path '%s' does not have their version"), ce->name);
 }
 
-static int checkout_merged(int pos, struct checkout *state)
+static int checkout_merged(int pos, const struct checkout *state)
 {
        struct cache_entry *ce = active_cache[pos];
        const char *path = ce->name;