Fixed incorrect mouseWheel position on Windows with HiDPI display

Author: luksladky

src/cinder/app/msw/AppImplMsw.cpp

@@ -906,7 +906,7 @@ LRESULT CALLBACK WndProc(	HWND	mWnd,			// Handle For This Window
 		case WM_MOUSEWHEEL: {
 			POINT pt = { ((int)(short)LOWORD(lParam)), ((int)(short)HIWORD(lParam)) };
 			::MapWindowPoints( NULL, mWnd, &pt, 1 );
-			MouseEvent event( impl->getWindow(), 0, int(impl->getContentScale() * pt.x), int(impl->getContentScale() * pt.y), prepMouseEventModifiers( wParam ),
+			MouseEvent event( impl->getWindow(), 0, impl->toPoints(pt.x), impl->toPoints(pt.y), prepMouseEventModifiers( wParam ),
 								GET_WHEEL_DELTA_WPARAM( wParam ) / 120.0f, static_cast<unsigned int>( wParam ) );
 			impl->getWindow()->emitMouseWheel( &event );
 		}