From a196fdb9afa2a085b03f23fc7d5740dacb0b3023 Mon Sep 17 00:00:00 2001
From: Oleg Oshmyan <chortos@inbox.lv>
Date: Wed, 8 Nov 2023 22:53:43 +0200
Subject: [PATCH] Treat empty Style name as "Default"

Fixes https://github.com/libass/libass/issues/714.
---
 libass/ass.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/libass/ass.c b/libass/ass.c
index 067948343..5919dc180 100644
--- a/libass/ass.c
+++ b/libass/ass.c
@@ -717,8 +717,10 @@ static int process_style(ASS_Track *track, char *str)
     style->Italic = !!style->Italic;
     style->Underline = !!style->Underline;
     style->StrikeOut = !!style->StrikeOut;
-    if (!style->Name)
+    if (!style->Name || !*style->Name) {
+        free(style->Name);
         style->Name = strdup("Default");
+    }
     if (!style->FontName)
         style->FontName = strdup("Arial");
     if (!style->Name || !style->FontName) {