Fix parsing of packets when --with-pcap is enabled

[Zadamsa]

No description provided.

[codecov-commenter]

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Codecov Report

Attention: Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.

Project coverage is 40.79%. Comparing base (70e7cc2) to head (cdbf52a).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
input/parser.cpp	0.00%	6 Missing ⚠️

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Additional details and impacted files

@@           Coverage Diff           @@
##           master     #254   +/-   ##
=======================================
  Coverage   40.78%   40.79%           
=======================================
  Files         104      104           
  Lines       10124    10125    +1     
  Branches     1492     1494    +2     
=======================================
+ Hits         4129     4130    +1     
- Misses       5130     5132    +2     
+ Partials      865      863    -2     

Flag	Coverage Δ
tests	40.79% <0.00%> (+<0.01%)	⬆️

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[SiskaPavel]

Moved to #256