Eliminate warning in D3D12MA

warning: 'QueryInterface' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]

Patch originally found in Qt:
https://github.com/qt/qtbase/blob/aec8398d71d351e956683a695af51317fe65097e/src/3rdparty/D3D12MemoryAllocator/patches/0001-Eliminate-warnings-in-D3D12MA.patch

Signed-off-by: Steve Lhomme <robux4@ycbcr.xyz>

include/D3D12MemAlloc.h

diff --git a/include/D3D12MemAlloc.h b/include/D3D12MemAlloc.h
index a12034f..ab5e01b 100644
--- a/include/D3D12MemAlloc.h
+++ b/include/D3D12MemAlloc.h
@@ -160,9 +160,9 @@
 {

 public:

     virtual ~IUnknownImpl() = default;

-    virtual HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppvObject);

-    virtual ULONG STDMETHODCALLTYPE AddRef();

-    virtual ULONG STDMETHODCALLTYPE Release();

+    HRESULT STDMETHODCALLTYPE QueryInterface(REFIID riid, void** ppvObject) override;

+    ULONG STDMETHODCALLTYPE AddRef() override;

+    ULONG STDMETHODCALLTYPE Release() override;

 protected:

     virtual void ReleaseThis() { delete this; }

 private: