cmd height changed to maximum

I can't figure out which plugin caused the issue, with minimum config it's ok, but with plugins enabled it shows the error.

I think the plugins related are peekaboo, vim-surround, vim-airline.

steps to reproduce:

1. record a micro like so: `qqf=ysiw"j0q`
`qq` record macro `q`
`f=` move to `=`
`ysiw"` add around a word `"`
`j0q` move to next line and to the beginning and end macro
2. keep applying `@q`
3. when there is a blank line, the error shows

screenshot before pressing `@q`:

screenshot after bug

at this point I had to resize the windows vertically to get it back,

set verbosefile=filename.txt
set verbose=9

relevant part of the log:

```
Executing BufEnter Autocommands for "*"
autocommand if g:repeat_tick == 0|let g:repeat_tick = b:changedtick|endif

Error detected while processing function peekaboo#aboo[76]..140_close:
line 1:
E939: Positive count required: bd 0
airline: group: airline_error already done, skipping
airline: group: airline_error_bold already done, skipping
airline: group: airline_error_red already done, skipping
airline: group: airline_c1_to_airline_x already done, skipping
airline: group: airline_c1_to_airline_x_bold already done, skipping
```

Reproduce the issue by repeatedly applying the recorded `@q` macro until a blank line is reached, then inspect the verbose log around `peekaboo#aboo` and `140_close`, especially the `E939: Positive count required: bd 0` error. Done means the command height remains usable and the reproduction no longer produces this error with the reported plugins enabled.

Written by the indexing model from the issue text.