Fix Heap-buffer-overflow (read) in NflogTlv::getType

[sashashura]

Closes:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=59862
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=59809
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=60456
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=60354

[codecov]

Codecov Report

Merging #1163 (8149225) into dev (5cdf3b7) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##              dev    #1163      +/-   ##
==========================================
- Coverage   82.18%   82.18%   -0.01%     
==========================================
  Files         154      154              
  Lines       19927    19922       -5     
  Branches     7523     7511      -12     
==========================================
- Hits        16377    16372       -5     
- Misses       3042     3043       +1     
+ Partials      508      507       -1     

Flag	Coverage Δ
alpine315	68.67% <0.00%> (+0.02%)	⬆️
centos7	72.01% <50.00%> (-0.03%)	⬇️
fedora34	68.51% <0.00%> (+0.03%)	⬆️
macos-11	60.19% <33.33%> (+<0.01%)	⬆️
macos-12	0.00% <0.00%> (-60.25%)	⬇️
macos-ventura	60.17% <33.33%> (-0.01%)	⬇️
mingw32	68.94% <0.00%> (-0.02%)	⬇️
mingw64	68.94% <0.00%> (-0.04%)	⬇️
npcap	82.16% <100.00%> (-0.06%)	⬇️
ubuntu1804	72.28% <50.00%> (+<0.01%)	⬆️
ubuntu2004	69.33% <0.00%> (+0.01%)	⬆️
ubuntu2204	68.29% <0.00%> (+0.02%)	⬆️
ubuntu2204-icpx	59.24% <33.33%> (+<0.01%)	⬆️
unittest	82.18% <100.00%> (-0.01%)	⬇️
windows-2019	82.15% <100.00%> (-0.07%)	⬇️
windows-2022	82.20% <100.00%> (-0.03%)	⬇️
winpcap	82.19% <100.00%> (+0.01%)	⬆️
zstd	72.03% <33.33%> (-0.03%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files Changed	Coverage Δ
Packet++/header/TLVData.h	93.16% <100.00%> (+0.11%)	⬆️

... and 20 files with indirect coverage changes