From d28d7bd52cfb8f98835d4792901c12785b3bf0b3 Mon Sep 17 00:00:00 2001
From: Danyil Blyschak <dblyschak@codeweavers.com>
Date: Tue, 21 May 2024 11:15:45 -0500
Subject: [PATCH] shcore: Check optional pointer in filestream_CopyTo() before
 writing to it.

Check that the 'written' parameter in this function is non-null before
incrementing it by 'written_chunk'.
---
 dlls/shcore/main.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/shcore/main.c b/dlls/shcore/main.c
index a64b6661d23..58ddda3fb2a 100644
--- a/dlls/shcore/main.c
+++ b/dlls/shcore/main.c
@@ -1017,7 +1017,7 @@ static HRESULT WINAPI filestream_CopyTo(IStream *iface, IStream *dest, ULARGE_IN
 
         /* Write */
         hr = IStream_Write(dest, buff, read_chunk, &written_chunk);
-        if (written_chunk)
+        if (written)
             written->QuadPart += written_chunk;
         if (FAILED(hr) || written_chunk != left)
             break;