Fixed error in reading zero-width bit from hybrid RLE.

[jorgecarleitao]

When the decoder has a zero bit width, it means that it is always the same value (0). We did not take this edge case into account.

[codecov-commenter]

Codecov Report

Merging #53 (e8da2c1) into main (4179260) will increase coverage by 0.07%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main      #53      +/-   ##
==========================================
+ Coverage   67.48%   67.56%   +0.07%     
==========================================
  Files          64       64              
  Lines        3485     3493       +8     
==========================================
+ Hits         2352     2360       +8     
  Misses       1133     1133              

Impacted Files	Coverage Δ
src/encoding/hybrid_rle/decoder.rs	92.15% <ø> (ø)
src/encoding/hybrid_rle/mod.rs	87.93% <100.00%> (+1.93%)	⬆️

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[aptr322]

@jorgecarleitao Thank you!