Fix Windows AV CI warnings and test failures

[mjcarroll]

I believe that these were introduced by changes in the Windows hosts, allowing the av component to be built and tested, so not necessarily a regression.

Signed-off-by: Michael Carroll michael@openrobotics.org

[codecov]

Codecov Report

Merging #135 (c55e9ee) into ign-common3 (63f7e55) will not change coverage.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##           ign-common3     #135   +/-   ##
============================================
  Coverage        75.38%   75.38%           
============================================
  Files               69       69           
  Lines             9488     9488           
============================================
  Hits              7153     7153           
  Misses            2335     2335           

Impacted Files	Coverage Δ
av/src/VideoEncoder.cc	72.24% <100.00%> (ø)

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[chapulina]

I believe that these were introduced by changes in the Windows hosts, allowing the av component to be built and tested

Totally! Nice! It looks like we can close #122 🎉