windowscodecs: Fix IWICBitmapDecoder::CopyPalette for a not initialized case in the GIF decoder.

Signed-off-by: Dmitry Timoshkov <dmitry@baikal.ru> Signed-off-by: Vincent Povirk <vincent@codeweavers.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

windowscodecs: Fix IWICBitmapDecoder::CopyPalette for a not initialized case in the GIF decoder.
18a915ef · Dmitry Timoshkov · Alexandre Julliard · 7eb1f5d6 · 18a915ef
Commit 18a915ef authored Apr 27, 2020 by Dmitry Timoshkov Committed by Alexandre Julliard Apr 27, 2020
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gifformat.c dlls/windowscodecs/gifformat.c +3 -0

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--- a/dlls/windowscodecs/gifformat.c
+++ b/dlls/windowscodecs/gifformat.c
@@ -1187,6 +1187,9 @@ static HRESULT WINAPI GifDecoder_CopyPalette(IWICBitmapDecoder *iface, IWICPalet

    TRACE("(%p,%p)\n", iface, palette);

+    if (!This->gif)
+        return WINCODEC_ERR_WRONGSTATE;
+
    cm = This->gif->SColorMap;
    if (cm)
    {