From c5c3447ca8a71ab3cfd84a2b5fd2c193ef5b4fb4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Ekl=C3=B6f?= <daniel@ekloef.se>
Date: Sun, 14 Mar 2021 14:19:12 +0100
Subject: [PATCH] sixel: sixel_overwrite_at_cursor(): early exit when the image
 list is empty

This avoids a call to sixel_overwrite_by_row() (where we also exit
early if the image list is empty).

This saves a couple of instructions to set up the arguments for
sixel_overwrite_by_row().
---
 sixel.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sixel.c b/sixel.c
index 96ba9214..be4981cf 100644
--- a/sixel.c
+++ b/sixel.c
@@ -610,6 +610,9 @@ sixel_overwrite_by_row(struct terminal *term, int _row, int col, int width)
 void
 sixel_overwrite_at_cursor(struct terminal *term, int width)
 {
+    if (likely(tll_length(term->grid->sixel_images) == 0))
+        return;
+
     sixel_overwrite_by_row(
         term, term->grid->cursor.point.row, term->grid->cursor.point.col, width);
 }