Added error message when input of seed subsampling equals 0

[DCHulskemper]

solves issue #230

[codecov-commenter]

Codecov Report

Merging #232 (1019dd3) into main (2e876cf) will decrease coverage by 0.04%. The diff coverage is 50.00%.

Additional details and impacted files

[](https://codecov.io/gh/3dgeo-heidelberg/py4dgeo/pull/232?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg) ```diff @@ Coverage Diff @@ ## main #232 +/- ## ========================================== - Coverage 89.13% 89.08% -0.05% ========================================== Files 19 19 Lines 1684 1686 +2 ========================================== + Hits 1501 1502 +1 - Misses 183 184 +1 ``` | Flag | Coverage Δ | | |---|---|---| | cxx | `86.84% <ø> (ø)` | | | python | `91.21% <50.00%> (-0.10%)` | :arrow_down: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg#carryforward-flags-in-the-pull-request-comment) to find out more. | [Impacted Files](https://codecov.io/gh/3dgeo-heidelberg/py4dgeo/pull/232?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg) | Coverage Δ | | |---|---|---| | [src/py4dgeo/segmentation.py](https://codecov.io/gh/3dgeo-heidelberg/py4dgeo/pull/232/diff?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg#diff-c3JjL3B5NGRnZW8vc2VnbWVudGF0aW9uLnB5) | `89.92% <50.00%> (-0.16%)` | :arrow_down: | ------ [Continue to review full report at Codecov](https://codecov.io/gh/3dgeo-heidelberg/py4dgeo/pull/232?src=pr&el=continue&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg). > **Legend** - [Click here to learn more](https://docs.codecov.io/docs/codecov-delta?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg) > `Δ = absolute (impact)`, `ø = not affected`, `? = missing data` > Powered by [Codecov](https://codecov.io/gh/3dgeo-heidelberg/py4dgeo/pull/232?src=pr&el=footer&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg). Last update [2e876cf...1019dd3](https://codecov.io/gh/3dgeo-heidelberg/py4dgeo/pull/232?src=pr&el=lastupdated&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg). Read the [comment docs](https://docs.codecov.io/docs/pull-request-comments?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=3dgeo-heidelberg).