Danyil Blyschak : shcore: Check optional pointer in filestream_CopyTo() before writing to it.

[Alexandre Julliard]

Module: wine
Branch: master
Commit: d28d7bd52cfb8f98835d4792901c12785b3bf0b3
URL:    https://gitlab.winehq.org/wine/wine/-/commit/d28d7bd52cfb8f98835d4792901c127...

Author: Danyil Blyschak 
Date:   Tue May 21 11:15:45 2024 -0500

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;