gdiplus: Avoid shift overflow in get_gif_background_color.

Signed-off-by: Gerald Pfeifer <gerald@pfeifer.com> Signed-off-by: Alexandre Julliard <julliard@winehq.org>

gdiplus: Avoid shift overflow in get_gif_background_color.
8f5b50d4 · Gerald Pfeifer · Alexandre Julliard · ad405780 · 8f5b50d4
Commit 8f5b50d4 authored Oct 19, 2015 by Gerald Pfeifer Committed by Alexandre Julliard Oct 29, 2015
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image.c dlls/gdiplus/image.c +1 -1

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--- a/dlls/gdiplus/image.c
+++ b/dlls/gdiplus/image.c
@@ -3838,7 +3838,7 @@ static DWORD get_gif_background_color(GpBitmap *bitmap)
        if(bitmap->prop_item[i].id == PropertyTagGlobalPalette) {
            if(bitmap->prop_item[i].length/3 > bgcolor_idx) {
                BYTE *color = ((BYTE*)bitmap->prop_item[i].value)+bgcolor_idx*3;
-                return color[2] + (color[1]<<8) + (color[0]<<16) + (0xff<<24);
+                return color[2] + (color[1]<<8) + (color[0]<<16) + (0xffu<<24);
            }
            break;
        }