Fix unsafe float == in logodds LUT; add unit tests

[jlblancoc]

Finally fixes the 1st bug reported in #949, which was still present in PPA 32bit builds.

Closes #949

[codecov]

Codecov Report

Merging #983 into develop will increase coverage by <.01%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           develop     #983      +/-   ##
===========================================
+ Coverage     37.1%   37.11%   +<.01%     
===========================================
  Files         1190     1191       +1     
  Lines       104657   104673      +16     
===========================================
+ Hits         38834    38847      +13     
- Misses       65823    65826       +3

Impacted Files	Coverage Δ
libs/ros1bridge/include/mrpt/ros1bridge/map.h	100% <ø> (ø)	⬆️
libs/maps/include/mrpt/maps/CLogOddsGridMapLUT.h	88.46% <100%> (-1.54%)	⬇️
libs/maps/src/maps/CLogOddsGridMapLUT_unittest.cpp	100% <100%> (ø)
libs/slam/src/slam/se3_ransac_unittest.cpp	95.83% <0%> (-4.17%)	⬇️

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