From 9c964471a424542ae957eb1a8395efd90633253e Mon Sep 17 00:00:00 2001
From: Nico Rieck <nico.rieck@gmail.com>
Date: Mon, 25 Sep 2023 09:07:27 +0200
Subject: [PATCH] Fix lzma compression level #731

LZMA_PRESET_EXTREME is not a preset on its own but a flag which must be
used together with a level. The difference between level 9 with and without
the extreme flag also seems negligible, so this commit just passes through
the level and maps -1 and invalid values to the default preset.
---
 mz_strm_lzma.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/mz_strm_lzma.c b/mz_strm_lzma.c
index 74469571..951546e9 100644
--- a/mz_strm_lzma.c
+++ b/mz_strm_lzma.c
@@ -415,10 +415,10 @@ int32_t mz_stream_lzma_set_prop_int64(void *stream, int32_t prop, int64_t value)
     mz_stream_lzma *lzma = (mz_stream_lzma *)stream;
     switch (prop) {
     case MZ_STREAM_PROP_COMPRESS_LEVEL:
-        if (value >= 9)
-            lzma->preset = LZMA_PRESET_EXTREME;
-        else
+        if (value < 0 || value > 9)
             lzma->preset = LZMA_PRESET_DEFAULT;
+        else
+            lzma->preset = (uint32_t)value;
         break;
     case MZ_STREAM_PROP_COMPRESS_METHOD:
         lzma->method = (int16_t)value;