From cd71c66703d975206aeeaf367d18d51f8ad28350 Mon Sep 17 00:00:00 2001
From: Hermet Park <hermet@lottiefiles.com>
Date: Mon, 21 Aug 2023 14:39:08 +0900
Subject: [PATCH] loader/jpg: fix a sanitizer report.

Bypass the operation involving a negative value shift.

../src/loaders/jpg/tvgJpgd.cpp:434:36: runtime error: left shift of negative value -5
---
 src/loaders/jpg/tvgJpgd.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/loaders/jpg/tvgJpgd.cpp b/src/loaders/jpg/tvgJpgd.cpp
index 88d66761..88d359aa 100644
--- a/src/loaders/jpg/tvgJpgd.cpp
+++ b/src/loaders/jpg/tvgJpgd.cpp
@@ -431,7 +431,7 @@ struct Row<1>
 {
     static void idct(int* pTemp, const jpgd_block_t* pSrc)
     {
-        const int dcval = (pSrc[0] << PASS1_BITS);
+        const int dcval = pSrc[0] * (pSrc[0] * (PASS1_BITS * 2));
 
         pTemp[0] = dcval;
         pTemp[1] = dcval;