Fix some compiler warnings

[grospelliergilles]

No description provided.

[codecov]

Codecov Report

Attention: Patch coverage is 84.61538% with 2 lines in your changes missing coverage. Please review.

Project coverage is 70.25%. Comparing base (e4735e5) to head (f73ee03).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
arcane/src/arcane/core/MeshUtils.cc	0.00%	1 Missing ⚠️
arcane/src/arcane/std/MeshPartitionerBase.h	90.90%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1777      +/-   ##
==========================================
- Coverage   70.26%   70.25%   -0.02%     
==========================================
  Files        2258     2258              
  Lines      162295   162279      -16     
  Branches    18694    18694              
==========================================
- Hits       114039   114002      -37     
- Misses      41488    41504      +16     
- Partials     6768     6773       +5     

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