fix: buffer is not divisible by scale X

[stacyharper]

To prevent this, we move where we set the buffer scale just after where we attach the new buffer to the surface. It should make sure the buffer scale, and the attached buffer stay consistent on the first commit.

ref: https://github.com/Cloudef/bemenu/pull/356

[dkwo]

this works for me, thanks.

[stacyharper]

Okay then I mark this as ready

[Cloudef]

Thanks