[FIX] Avoid unsecure use of printf

[juangpc]

No description provided.

[codecov]

Codecov Report

Merging #868 (b3f330a) into main (03e7ecd) will increase coverage by 0.00%.
The diff coverage is 0.00%.

@@           Coverage Diff           @@
##             main     #868   +/-   ##
=======================================
  Coverage   30.19%   30.20%           
=======================================
  Files         452      452           
  Lines       39208    39208           
=======================================
+ Hits        11840    11841    +1     
+ Misses      27368    27367    -1     

Impacted Files	Coverage Δ
libraries/inverse/dipoleFit/ecd_set.cpp	50.00% <0.00%> (ø)
libraries/mne/c/mne_surface_or_volume.cpp	48.41% <0.00%> (+0.05%)	⬆️