NativeVertexFormat: Add missing override specifier

Source/Core/VideoBackends/D3D/NativeVertexFormat.cpp

@@ -20,7 +20,7 @@ public:
 	D3DVertexFormat(const PortableVertexDeclaration& vtx_decl);
 	~D3DVertexFormat() { SAFE_RELEASE(m_layout); }
 
-	void SetupVertexPointers();
+	void SetupVertexPointers() override;
 
 private:
 	std::array<D3D11_INPUT_ELEMENT_DESC, 32> m_elems{};

Source/Core/VideoBackends/D3D12/NativeVertexFormat.h

@@ -16,7 +16,7 @@ public:
 	D3DVertexFormat(const PortableVertexDeclaration& vtx_decl);
 	~D3DVertexFormat();
 
-	void SetupVertexPointers();
+	void SetupVertexPointers() override;
 
 	D3D12_INPUT_LAYOUT_DESC GetActiveInputLayout12() const;