Fix return of 0-length tibbles for TEOW

[goergen95]

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[codecov]

Codecov Report

Attention: 3 lines in your changes are missing coverage. Please review.

Comparison is base (59a4c93) 73.36% compared to head (a48f71a) 73.31%.

❗ Current head a48f71a differs from pull request most recent head 2a8f8fd. Consider uploading reports for the commit 2a8f8fd to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #199      +/-   ##
==========================================
- Coverage   73.36%   73.31%   -0.05%     
==========================================
  Files          43       43              
  Lines        1817     1825       +8     
==========================================
+ Hits         1333     1338       +5     
- Misses        484      487       +3     

Files	Coverage Δ
R/calc_biome.R	95.23% <100.00%> (+0.50%)	⬆️
R/calc_ecoregion.R	95.74% <75.00%> (-2.04%)	⬇️
R/calc_indicators.R	70.90% <50.00%> (-0.79%)	⬇️

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