fix build errors

[my3]

#206

[fsouza]

@my3 thanks for fixing this!

[codecov-io]

Codecov Report

Merging #207 into master will not change coverage.
The diff coverage is 25%.

@@           Coverage Diff           @@
##           master     #207   +/-   ##
=======================================
  Coverage   78.62%   78.62%           
=======================================
  Files          29       29           
  Lines        2914     2914           
=======================================
  Hits         2291     2291           
  Misses        372      372           
  Partials      251      251

Impacted Files	Coverage Δ
provider/bitmovin/bitmovin.go	65.14% <0%> (ø)	⬆️
provider/zencoder/zencoder.go	82.62% <100%> (ø)	⬆️

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