FIX: helmet

[GuillaumeFavelier]

This PR fixes the bug introduced in #10200

main	PR

import os.path as op
import mne
from mne.io import read_info


data_path = mne.datasets.sample.data_path()
subjects_dir = op.join(data_path, 'subjects')
subject = 'sample'

fname_raw = op.join(data_path, 'MEG', subject, subject + '_audvis_raw.fif')
fname_trans = op.join(data_path, 'MEG', subject, f'{subject}_audvis_raw-trans.fif')

trans = mne.read_trans(fname_trans)
info = read_info(fname_raw)

mne.viz.plot_alignment(
    info=info,
    trans=trans,
    subject='sample',
    subjects_dir=subjects_dir,
    coord_frame='meg'
)

[hoechenberger]

Perfect, thank you!