fix: prevent balance-windows from resizing chat window

[sata]

Without this change, when running balance-windows, even if eca-chat window is a side window, it will try to balance it.

An alternative is to not use side window, but the implication then is, your chat constantly is resized when opening/closing buffers and running balance-windows

With this fix, your side window size is respected regardless of other buffers/windows.

Relates to #126

I'm not really a elisp coder, so I'm up for any changes to the few lines this change consist of.

Current version

After applying patch

[ericdallo]

I don't see any harm, looks good, thank you!

[ericdallo]

@sata Actually I reverted that after relaizing this blocks user from change chat size even for when on side window (I myself use this all the time via enlarge-window function).
We should find a alternative way or you can do that only for yourself via a hook

[sata]

@sata Actually I reverted that after relaizing this blocks user from change chat size even for when on side window (I myself use this all the time via enlarge-window function). We should find a alternative way or you can do that only for yourself via a hook

@ericdallo Ah! I didn't use that, but I see it doesn't work.

This works for me. Essentially wrapping a advice around balance-window, pinning window-size-fixed buffer local variable for any chat buffer then essentially unsetting it by going over the buffers it manipulated.

I'll give this a go for a few days and see how I get on. Became more complicated than I thought and also I'm not a huge fan of messing around with advices for general use. Perhaps there is a better way to do it 'as a standard' -- thought as a side window, it just doesn't seem right how balance-window behaves without this fix.