NativeVertexFormat: Inline Initialize in contructor

They were only called at once, so no need to seperate them.

This also removes the only dereference of the NativeVertexFormat in VideoCommon, so backends may just return nullptr.

Source/Core/VideoBackends/D3D/NativeVertexFormat.cpp

@@ -20,16 +20,15 @@ class D3DVertexFormat : public NativeVertexFormat
 	ID3D11InputLayout* m_layout;
 
 public:
-	D3DVertexFormat() : m_num_elems(0), m_layout(nullptr) {}
+	D3DVertexFormat(const PortableVertexDeclaration& vtx_decl);
 	~D3DVertexFormat() { SAFE_RELEASE(m_layout); }
 
-	void Initialize(const PortableVertexDeclaration &_vtx_decl);
 	void SetupVertexPointers();
 };
 
-NativeVertexFormat* VertexManager::CreateNativeVertexFormat()
+NativeVertexFormat* VertexManager::CreateNativeVertexFormat(const PortableVertexDeclaration& vtx_decl)
 {
-	return new D3DVertexFormat();
+	return new D3DVertexFormat(vtx_decl);
 }
 
 static const DXGI_FORMAT d3d_format_lookup[5*4*2] =
@@ -57,9 +56,10 @@ DXGI_FORMAT VarToD3D(VarType t, int size, bool integer)
 	return retval;
 }
 
-void D3DVertexFormat::Initialize(const PortableVertexDeclaration &_vtx_decl)
+D3DVertexFormat::D3DVertexFormat(const PortableVertexDeclaration& _vtx_decl)
+ : m_num_elems(0), m_layout(nullptr)
 {
-	vtx_decl = _vtx_decl;
+	this->vtx_decl = _vtx_decl;
 	memset(m_elems, 0, sizeof(m_elems));
 	const AttributeFormat* format = &_vtx_decl.position;