Fix prototype declaration warnings

[nrbrook]

Platforms affected

What does this PR do?

What testing has been done on this change?

Checklist

• Reported an issue in the JIRA database
• Commit message follows the format: "CB-3232: (android) Fix bug with resolving file paths", where CB-xxxx is the JIRA ID & "android" is the platform affected.
• Added automated test coverage as appropriate for this change.

[codecov-io]

Codecov Report

Merging #356 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #356   +/-   ##
=======================================
  Coverage   63.45%   63.45%           
=======================================
  Files          14       14           
  Lines        1691     1691           
  Branches      284      284           
=======================================
  Hits         1073     1073           
  Misses        618      618

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