vga: fix region checks in wraparound case
Cc: "Dr. David Alan Gilbert" <dgilbert@redhat.com> Signed-off-by: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-id: 20171030102830.4469-1-kraxel@redhat.com
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@ -1666,9 +1666,9 @@ static void vga_draw_graphic(VGACommonState *s, int full_update)
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/* scanline wraps from end of video memory to the start */
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assert(force_shadow);
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update = memory_region_snapshot_get_dirty(&s->vram, snap,
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page0, 0);
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page0, s->vbe_size - page0);
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update |= memory_region_snapshot_get_dirty(&s->vram, snap,
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page1, 0);
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0, page1);
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} else {
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update = memory_region_snapshot_get_dirty(&s->vram, snap,
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page0, page1 - page0);
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