Merge branch 'jc/plug-fmt-merge-msg-leak' into maint

* jc/plug-fmt-merge-msg-leak:
  fmt-merge-msg: plug small leak of commit buffer

builtin/fmt-merge-msg.c

@@ -223,16 +223,14 @@ static void add_branch_desc(struct strbuf *out, const char *name)
 
 #define util_as_integral(elem) ((intptr_t)((elem)->util))
 
-static void record_person(int which, struct string_list *people,
-			  struct commit *commit)
+static void record_person_from_buf(int which, struct string_list *people,
+				   const char *buffer)
 {
-	const char *buffer;
 	char *name_buf, *name, *name_end;
 	struct string_list_item *elem;
 	const char *field;
 
 	field = (which == 'a') ? "\nauthor " : "\ncommitter ";
-	buffer = get_commit_buffer(commit, NULL);
 	name = strstr(buffer, field);
 	if (!name)
 		return;
@@ -245,7 +243,6 @@ static void record_person(int which, struct string_list *people,
 	if (name_end < name)
 		return;
 	name_buf = xmemdupz(name, name_end - name + 1);
-	unuse_commit_buffer(commit, buffer);
 
 	elem = string_list_lookup(people, name_buf);
 	if (!elem) {
@@ -256,6 +253,15 @@ static void record_person(int which, struct string_list *people,
 	free(name_buf);
 }
 
+
+static void record_person(int which, struct string_list *people,
+			  struct commit *commit)
+{
+	const char *buffer = get_commit_buffer(commit, NULL);
+	record_person_from_buf(which, people, buffer);
+	unuse_commit_buffer(commit, buffer);
+}
+
 static int cmp_string_list_util_as_integral(const void *a_, const void *b_)
 {
 	const struct string_list_item *a = a_, *b = b_;