Zoom is broken in the globe example

Summary

In the globe example, we cannot zoom with the mouse wheel.

Steps to reproduce

1. Open the globe example
2. Zoom in/out with the mouse wheel

Expected behaviour

The camera is moving in/out

Actual behaviour

Nothing happens except for an error in the console

Informations

• Giro3D version: 0.43.5
• Browser (Firefox, Chrome, Opera, Safari...) and version: Firefox
• OS (Linux, MacOS, Windows...) Linux