vp9: Provide a default initializer for "hidden" member
The API of VP9 exposes a WasFrameHidden() function which accesses this member. Given the constructor previously didn't initialize this member, it's a potential vector for an uninitialized read. Instead, we can initialize this to a deterministic value to prevent that from occurring.
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@ -159,7 +159,7 @@ private:
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std::array<s8, 4> loop_filter_ref_deltas{};
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std::array<s8, 2> loop_filter_mode_deltas{};
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bool hidden;
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bool hidden = false;
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s64 current_frame_number = -2; // since we buffer 2 frames
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s32 grace_period = 6; // frame offsets need to stabilize
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std::array<FrameContexts, 4> frame_ctxs{};
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