line-log.c: make line_log_data_init() static

No external callers exist.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/line-log.c b/line-log.c
index b7864ad..a490efe 100644
--- a/line-log.c
+++ b/line-log.c
@@ -237,7 +237,7 @@
 	range_set_release(&diff->target);
 }
 
-void line_log_data_init(struct line_log_data *r)
+static void line_log_data_init(struct line_log_data *r)
 {
 	memset(r, 0, sizeof(struct line_log_data));
 	range_set_init(&r->ranges, 0);