Fix warning appearing in older gcc versions.

[galanCA]

Fixes the warning that it appears in EnergyPlus.

[codecov]

Codecov Report

Merging #49 (657d5bf) into develop (1c699e7) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           develop      #49   +/-   ##
========================================
  Coverage    59.20%   59.20%           
========================================
  Files           21       21           
  Lines         5064     5064           
========================================
  Hits          2998     2998           
  Misses        2066     2066           

Flag	Coverage Δ
integration	59.20% <ø> (ø)
unit	59.20% <ø> (ø)

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