From 875ba300a91781253b24c6bb2c479c2b5e8e92df Mon Sep 17 00:00:00 2001
From: "Dr.Smile" <vabnick@gmail.com>
Date: Thu, 17 Feb 2022 16:00:29 +0300
Subject: renderer: fix handling of empty clip outlines

Fixes https://github.com/libass/libass/issues/594.
---
 libass/ass_render.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/libass/ass_render.c b/libass/ass_render.c
index e2d0ef5..40b6d5d 100644
--- a/libass/ass_render.c
+++ b/libass/ass_render.c
@@ -677,10 +677,8 @@ static void blend_vector_clip(ASS_Renderer *render_priv, ASS_Image *head)
         return;
     }
     Bitmap *clip_bm = ass_cache_get(render_priv->cache.bitmap_cache, &key, render_priv);
-    if (!clip_bm || !clip_bm->buffer) {
-        ass_cache_dec_ref(clip_bm);
+    if (!clip_bm)
         return;
-    }
 
     // Iterate through bitmaps and blend/clip them
     for (ASS_Image *cur = head; cur; cur = cur->next) {
-- 
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