[Fix] Fix leak in test_coregistration and attends various warnings

[juangpc]

[codecov-commenter]

Codecov Report

Merging #849 (d118b7c) into main (fe015fd) will decrease coverage by 0.01%. The diff coverage is 41.66%.

@@            Coverage Diff             @@
##             main     #849      +/-   ##
==========================================
- Coverage   30.10%   30.08%   -0.02%     
==========================================
  Files         452      452              
  Lines       39254    39253       -1     
==========================================
- Hits        11816    11809       -7     
- Misses      27438    27444       +6     

Impacted Files	Coverage Δ
libraries/disp3D/engine/view/view3D.cpp	0.42% <ø> (+<0.01%)	:arrow_up:
libraries/mne/mne.cpp	1.42% <ø> (ø)
libraries/mne/mne_forwardsolution.cpp	20.70% <0.00%> (-0.14%)	:arrow_down:
libraries/mne/mne_forwardsolution.h	3.22% <ø> (-8.54%)	:arrow_down:
libraries/rtprocessing/icp.cpp	82.02% <ø> (ø)
testframes/test_filtering/test_filtering.cpp	100.00% <ø> (ø)
testframes/test_hpiFit/test_hpiFit.cpp	97.93% <ø> (ø)
...y_surface_set/test_mne_msh_display_surface_set.cpp	100.00% <ø> (ø)
libraries/inverse/hpiFit/hpifit.cpp	82.25% <50.00%> (-0.23%)	:arrow_down:
...frames/test_coregistration/test_coregistration.cpp	94.54% <100.00%> (-0.10%)	:arrow_down:
... and 4 more

[juangpc]

@LorenzE Please review this whenever you can.