Fix the stats year label and a missing author

The year period rendered without its label, and a commit with no
author line crashed the view.

1 file changed, 4 insertions, 2 deletions

diff --git a/source/ui-stats.c b/source/ui-stats.c
index 02c60ef..ce6a26a 100644
--- a/source/ui-stats.c
+++ b/source/ui-stats.c
@@ -162,7 +162,7 @@ int cgit_find_stats_period(const char *expr, const struct cgit_period **period)
 
 const char *cgit_find_stats_periodname(int idx)
 {
-	if (idx > 0 && idx < 4)
+	if (idx > 0 && idx <= (int)ARRAY_SIZE(periods))
 		return periods[idx - 1].name;
 	else
 		return "";
@@ -181,7 +181,9 @@ static void add_commit(struct string_list *authors, struct commit *commit,
 	uintptr_t *counter;
 
 	info = cgit_parse_commit(commit);
-	tmp = xstrdup(info->author);
+	/* A commit can lack an author header, so fall back rather than
+	 * xstrdup(NULL). */
+	tmp = xstrdup(info->author ? info->author : "(unknown)");
 	author = string_list_insert(authors, tmp);
 	if (!author->util)
 		author->util = xcalloc(1, sizeof(struct authorstat));