Fix artifacts when vsync is off.

Author: bolrog

src/d2dx/RenderContext.cpp

@@ -465,18 +465,13 @@ void RenderContext::Present()
 		break;
 	case RenderContextSyncStrategy::Interval1:
 		D2DX_CHECK_HR(_swapChain1->Present(1, 0));
-		/*
-		ComPtr<IDXGIOutput> output;
-		_swapChain1->GetContainingOutput(&output);
-
-		output->WaitForVBlank();*/
-
-		double curTime = TimeEndMs(_timeStart);
-		_frameTimeMs = curTime - _prevTime;
-		_prevTime = curTime;
 		break;
 	}
 
+	double curTime = TimeEndMs(_timeStart);
+	_frameTimeMs = curTime - _prevTime;
+	_prevTime = curTime;
+
 	if (_deviceContext1)
 	{
 		_deviceContext1->DiscardView(_resources->GetFramebufferRtv(RenderContextFramebuffer::Game));