blame: move entry prepend to libgit

Signed-off-by: Jeff Smith <whydoubt@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

blame.c

@@ -1845,3 +1845,19 @@ void setup_scoreboard(struct blame_scoreboard *sb, const char *path, struct blam
 	if (orig)
 		*orig = o;
 }
+
+
+
+struct blame_entry *blame_entry_prepend(struct blame_entry *head,
+					long start, long end,
+					struct blame_origin *o)
+{
+	struct blame_entry *new_head = xcalloc(1, sizeof(struct blame_entry));
+	new_head->lno = start;
+	new_head->num_lines = end - start;
+	new_head->suspect = o;
+	new_head->s_lno = start;
+	new_head->next = head;
+	blame_origin_incref(o);
+	return new_head;
+}

blame.h

@@ -170,4 +170,6 @@ extern const char *blame_nth_line(struct blame_scoreboard *sb, long lno);
 extern void init_scoreboard(struct blame_scoreboard *sb);
 extern void setup_scoreboard(struct blame_scoreboard *sb, const char *path, struct blame_origin **orig);
 
+extern struct blame_entry *blame_entry_prepend(struct blame_entry *head, long start, long end, struct blame_origin *o);
+
 #endif /* BLAME_H */

builtin/blame.c

@@ -648,20 +648,6 @@ static int blame_move_callback(const struct option *option, const char *arg, int
 	return 0;
 }
 
-struct blame_entry *blame_entry_prepend(struct blame_entry *head,
-					long start, long end,
-					struct blame_origin *o)
-{
-	struct blame_entry *new_head = xcalloc(1, sizeof(struct blame_entry));
-	new_head->lno = start;
-	new_head->num_lines = end - start;
-	new_head->suspect = o;
-	new_head->s_lno = start;
-	new_head->next = head;
-	blame_origin_incref(o);
-	return new_head;
-}
-
 int cmd_blame(int argc, const char **argv, const char *prefix)
 {
 	struct rev_info revs;