Need for 3rd decimal precision for clamp_min_log

[ZeeshanshariffNS]

Hi, @ZbyLGsc

I see that the occupancy_buffer comparison with clamp_min_log_ is done considering 3rd decimal precision.
for exmaple in FUEL/fuel_planner/plan_env/src/map_ros.cpp line no : 249
""if (map_->md_->occupancy_buffer_[map_->toAddress(x, y, z)] > map_->mp_->clamp_min_log_ - 1e-3)""

I want to understand the necessity for such precision comparison, if i remove (- 1e-3) from the the code. will it have any impact on the overall performance