ui-stats: make cgit_period definitions 'static const'
These definitions should not be modified (and never are) so we can move
them to .rodata.
Signed-off-by: John Keeping <john@keeping.me.uk>
diff --git a/ui-stats.h b/ui-stats.h
index 341ab13..0e61b03 100644
--- a/ui-stats.h
+++ b/ui-stats.h
@@ -20,7 +20,7 @@
char *(*pretty)(struct tm *tm);
};
-extern int cgit_find_stats_period(const char *expr, struct cgit_period **period);
+extern int cgit_find_stats_period(const char *expr, const struct cgit_period **period);
extern const char *cgit_find_stats_periodname(int idx);
extern void cgit_show_stats(void);