From dc404119e5377ce18e49bedeeab3f0ff8b815d87 Mon Sep 17 00:00:00 2001
From: Yann Collet <cyan@fb.com>
Date: Sat, 30 Sep 2017 15:02:40 -0700
Subject: [PATCH] ZSTD_adjustCParams_internal : minor optimization

---
 lib/compress/zstd_compress.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lib/compress/zstd_compress.c b/lib/compress/zstd_compress.c
index 51cdeaf0..2511ab29 100644
--- a/lib/compress/zstd_compress.c
+++ b/lib/compress/zstd_compress.c
@@ -652,7 +652,7 @@ ZSTD_compressionParameters ZSTD_adjustCParams_internal(ZSTD_compressionParameter
     if (dictSize && (srcSize+1<2) /* srcSize unknown */ )
         srcSize = minSrcSize;  /* presumed small when there is a dictionary */
     else if (srcSize == 0)
-        srcSize -= 1;  /* unknown 0 => -1ULL : presumed large */
+        srcSize = ZSTD_CONTENTSIZE_UNKNOWN;  /* 0 == unknown : presumed large */
 
     /* resize windowLog if input is small enough, to use less memory */
     if ( (srcSize < maxWindowResize)