Return one more commit when get repo history (#603)

Co-authored-by: 杨赫然 <heran.yang@seafile.com>

common/rpc-service.c

@@ -396,8 +396,12 @@ get_commit (SeafCommit *c, void *data, gboolean *stop)
              (gint64)(c->ctime) <= cp->truncate_time &&
              cp->traversed_head)
     {
+        /* Still traverse the first commit older than truncate_time.
+         * If a file in the child commit of this commit is deleted,
+         * we need to access this commit in order to restore it
+         * from trash.
+         */
         *stop = TRUE;
-        return TRUE;
     }
 
     /* Always traverse the head commit. */