D3D9: fixed device failing to reset

This is because backbuffer did not have matching number of Releases after querying initial render target, causing it to stay in resources.

Was broken by aa0647d

Engine/platform/windows/gfx/ali3dd3d.cpp

@@ -672,6 +672,7 @@ void D3DGraphicsDriver::SetupViewport()
   direct3ddevice->GetRenderTarget(0, &backbuffer);
   _screenBackbuffer = BackbufferState(backbuffer, Size(_mode.Width, _mode.Height), _srcRect.GetSize(),
       _dstRect, mat_ortho, _scaling, _filter ? _filter->GetSamplerStateForStandardSprite() : D3DTEXF_POINT);
+  backbuffer->Release();
 
   // View and Projection matrixes are currently fixed in Direct3D renderer
   _stageMatrixes.View = identity;
@@ -769,8 +770,8 @@ HRESULT D3DGraphicsDriver::ResetD3DDevice()
     {
         DestroyDDB(_nativeSurface);
         _nativeSurface = nullptr;
-        _nativeBackbuffer = BackbufferState();
     }
+    _nativeBackbuffer = BackbufferState();
     ReleaseRenderTargetData();
     HRESULT hr = direct3ddevice->Reset(&d3dpp);
     if (hr != D3D_OK)