Fix undefined variable

[jvsg]

This addresses yetone/avante.nvim#2038

[axelf4]

Thanks, but that is not correct, it will reset those variables on every change. Instead, I pushed commit 301262f to the set-do_lines-buf branch. Could you please test if that resolves the issue?

[jvsg]

I pushed ... to the set-do_lines-buf branch.

I think there's a typo in the link text. It should be set-on_lines-buf.

And I've tested it and works fine for me.