PERL WARNING - Kopp Fix - https://github.com/RFD-FHEM/RFFHEM/issues/968

[HomeAutoUser]

• Please check if the PR fulfills these requirements

• Tests for the changes have been added / modified (needed for for bug fixes / features)
• commandref has been added / updated (needed for bug fixes / features)
• CHANGED has been updated (needed for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)
  Bug fix

• What is the current behavior? (You can also link to an open issue here)
  PERL WARNING (v3.5.1+20210505 - PERL WARNING: Use of uninitialized value in hex at FHEM/lib/SD_Protocols.pm line 1821. #968 (comment))

• What is the new behavior (if this is a feature change)?
  no PERL WARNING

2021.05.25 13:21:30.703 4: sduino_dummy: get rawmsg: �MN;D=0A018200CA043A90;R=204;�
2021.05.25 13:21:30.708 4: sduino_dummy: Parse_MN, 2-FSK Protocol id 100 Lacrosse mode 1 msg 0A018200CA043A90 not match (?^:^9)
2021.05.25 13:21:30.713 4: sduino_dummy: Parse_MN, Error! id 101 msg=0A018200CA043A90, message is to short
2021.05.25 13:21:30.717 4: sduino_dummy: Parse_MN, Found GFSK Protocol id 102 -> KoppFreeControl with match (?^:^0)
2021.05.25 13:21:30.721 4: sduino_dummy: Parse_MN, Error! method ConvKoppFreeControl, hexData is to short
2021.05.25 13:21:30.725 4: sduino_dummy: Parse_MN, 2-FSK Protocol id 103 Lacrosse mode 2 msg 0A018200CA043A90 not match (?^:^9)

• Does this PR introduce a breaking change? (What changes might users need to make in their application due to this PR?)

• Other information:

[codecov]

Codecov Report

Merging #972 (c636255) into master (2c4ac54) will increase coverage by 0.03%.
The diff coverage is 88.88%.

@@            Coverage Diff             @@
##           master     #972      +/-   ##
==========================================
+ Coverage   58.33%   58.37%   +0.03%     
==========================================
  Files         106      106              
  Lines        8478     8485       +7     
  Branches     1323     1323              
==========================================
+ Hits         4946     4953       +7     
  Misses       2638     2638              
  Partials      894      894              

Flag	Coverage Δ
fhem	48.56% <0.00%> (ø)
modules	58.37% <88.88%> (+0.03%)	⬆️
perl	91.54% <88.88%> (+0.02%)	⬆️
unittests	58.37% <88.88%> (+0.03%)	⬆️

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Impacted Files	Coverage Δ
FHEM/lib/SD_Protocols.pm	79.01% <0.00%> (ø)
t/SD_Protocols/02_ConvKoppFreeControl.t	100.00% <100.00%> (ø)

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[sidey79]

Ich habe den Test ergänzt

[HomeAutoUser]

@sidey79 Danke :-)