Append line that got lost during previous commit

viewer/glow-extras/viewer/ViewerApp.cc

@@ -255,6 +255,7 @@ void ViewerApp::updateCamera(float dt)
     dFwd += int(mKeyW) * speed;
     dFwd -= int(mKeyS) * speed;
     dUp += int(mKeyE) * speed;
+    dUp -= int(mKeyQ) * speed;
 
     auto& cam = cameraAtPosition(tg::ipos2(mLastX, mLastY));
     cam.moveCamera(dRight, dFwd, dUp, 0.f, dt);