bins: fix ndpi_set_bin, ndpi_inc_bin and ndpi_get_bin_value

[IvanNardi]

When the required slot is too big, use the latest/bigger available bin, not in the first one.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud

[utoni]

Doesn't it make more sense to let the library crash if someone uses it the wrong way instead of modifying already doomed code? 😃

[IvanNardi]

Current code doesn't crash; it simply puts "big" values in the first slot.
While using this code to plot some histogram with excel, I found weird that "too big/ out-of-scale" values are shown in the far left of the histogram, instead of in the far right...

[utoni]

Current code doesn't crash; it simply puts "big" values in the first slot.

Sometimes it can be useful to let a library crash, especially if some third party uses the API in the wrong way. But I just saw that there is no documentation in src/include/ndpi_api.h, so I guess it's fine.