Widget dimensions, Auto (max) 0?

When creating scrollable widget sections in workshop, we’ve previously set Auto (max) with an arbitrary large number in the widget dimensions settings, similar to what was described in this post. My colleague found out that using the value 0 has the same effect, but since this magic number is not mentioned in the display documentation, is this considered undefined behavior? Or can we rely on it without fearing a future patch that makes all our workshop apps significantly slimmer.