Allow popups on VectorGrid point features with radius <= 10

[TcgEndo]

Hi, thank you for maintaining Leaflet.VectorGrid.

When using Leaflet.VectorGrid.Protobuf with point data, I would like popups to work even when the point radius is less than 11.

Observed behavior

In my setup:

• radius >= 11 → the point is rendered and the popup works without any errors
• radius <= 10 → the point geometry is rendered correctly, but clicking on the point causes an error and the popup does not open

The error message is:

Uncaught TypeError: Cannot read properties of undefined (reading 'lat')

I was able to work around this by following the solution described in this comment on issue #267:
#267 (comment)

However, it took me quite a while to find this workaround.
It would be very helpful if popups worked out of the box for VectorGrid point features with smaller radii (i.e. < 11), or if there were an official fix or clearer guidance in the documentation.

Environment

• Leaflet: v1.9.4
• Leaflet.VectorGrid: v1.3.0 (Protobuf / Slicer)
• Browser: Chrome 141.0.7390.123
• OS: Windows 11

Thank you for your consideration!