From fe018b5ee9ef619c7657476f65fa5d5f4a757d29 Mon Sep 17 00:00:00 2001
From: Oleg Oshmyan <chortos@inbox.lv>
Date: Sun, 5 Jul 2020 21:42:33 +0300
Subject: ass_font: fix typo in zero height check

---
 libass/ass_font.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'libass')

diff --git a/libass/ass_font.c b/libass/ass_font.c
index a62c91c..5f29c2a 100644
--- a/libass/ass_font.c
+++ b/libass/ass_font.c
@@ -117,7 +117,7 @@ static void set_font_metrics(FT_Face face)
     // Anything without valid OS/2 Win values isn't supported by VSFilter,
     // so at this point compatibility's out the window and we're just
     // trying to render _something_ readable.
-    if (face->ascender + face->descender == 0 || face->height == 0) {
+    if (face->ascender - face->descender == 0 || face->height == 0) {
         if (os2 && (os2->sTypoAscender - os2->sTypoDescender) != 0) {
             face->ascender = os2->sTypoAscender;
             face->descender = os2->sTypoDescender;
-- 
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