Duplicate code elimination

[talaj]

No description provided.

[codecov-io]

Codecov Report

Merging #243 into master will decrease coverage by 0.15%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master     #243      +/-   ##
==========================================
- Coverage   60.17%   60.01%   -0.16%     
==========================================
  Files          30       30              
  Lines        2142     2111      -31     
==========================================
- Hits         1289     1267      -22     
+ Misses        853      844       -9

Impacted Files	Coverage Δ
src/vector_tile_processor.ipp	74.71% <100%> (+1.28%)	⬆️
src/vector_tile_geometry_clipper.hpp	0% <0%> (ø)	⬆️

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[springmeyer]

Thank you @talaj - will merge now. There was one unrelated failure for OS X that I fixed in master with #244