Prevent empty messages from spamming the console.

[nkoenig]

A topic could publish an Int32 or Int64 message with data=0. In this situation the protobuf message has size zero. While this is not a problem for protobuf messages, it is considered an error for SQLite3.

Added logic to prevent console spamming.

Signed-off-by: Nate Koenig [email protected]

[codecov]

Codecov Report

Merging #164 into ign-transport7 will decrease coverage by 0.01%.
The diff coverage is 25.00%.

@@                Coverage Diff                 @@
##           ign-transport7     #164      +/-   ##
==================================================
- Coverage           89.75%   89.73%   -0.02%     
==================================================
  Files                  49       49              
  Lines                4793     4795       +2     
==================================================
+ Hits                 4302     4303       +1     
- Misses                491      492       +1     

Impacted Files	Coverage Δ
log/src/Recorder.cc	87.20% <0.00%> (ø)
log/src/Log.cc	78.72% <33.33%> (-0.21%)	⬇️

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[caguero]

That protobuf behavior for default values might be more efficient but it's super annoying. I remember hitting us multiple times.