File _service:obs_scm:backport-fontconfig-fix-minor-... of Package libass

File _service:obs_scm:backport-fontconfig-fix-minor-memory-leak.patch of Package libass

From 6e83137cdbaf4006439d526fef902e123129707b Mon Sep 17 00:00:00 2001
From: Oneric <oneric@oneric.stub>
Date: Tue, 9 Jul 2024 18:00:37 +0200
Subject: [PATCH] fontconfig: fix minor memory leak

When the used config is completely devoid of fonts
FcFontSort will attempt to allocate an empty set and
return it while still setting the result to invalid.

Fortunately this seems unlikely to affect any real-world setups,
but we should handle it correctly nevertheless.

Identified-by: kasper93
---
 libass/ass_fontconfig.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/libass/ass_fontconfig.c b/libass/ass_fontconfig.c
index 27233a74c..d1f094f24 100644
--- a/libass/ass_fontconfig.c
+++ b/libass/ass_fontconfig.c
@@ -105,8 +105,11 @@ static bool scan_fonts(FcConfig *config, ASS_FontProvider *provider)
     // trim=FcFalse returns all system fonts
     fonts = FcFontSort(config, pat, FcFalse, NULL, &res);
     FcPatternDestroy(pat);
-    if (res != FcResultMatch)
+    if (res != FcResultMatch) {
+        if (fonts)
+            FcFontSetDestroy(fonts);
         return false;
+    }
 
     // fill font_info list
     for (i = 0; i < fonts->nfont; i++) {