fix minus encode and decode.

[ColinLeeo]

To Fix: #452

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 65.76%. Comparing base (6672d2d) to head (0eb48f8).

Files with missing lines	Patch %	Lines
cpp/src/common/allocator/byte_stream.h	83.33%	1 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #511   +/-   ##
========================================
  Coverage    65.76%   65.76%           
========================================
  Files          566      566           
  Lines        33317    33321    +4     
  Branches      4660     4660           
========================================
+ Hits         21912    21915    +3     
- Misses       10753    10754    +1     
  Partials       652      652           

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