[GRASS-git] [OSGeo/grass] 8f6b6f: grass.gunittest: Add check for precision test (#2818)

[Vaclav Petras]

  Branch: refs/heads/main
  Home:   https://github.com/OSGeo/grass
  Commit: 8f6b6fab079f75096e0971f877197893f489e1c4
      https://github.com/OSGeo/grass/commit/8f6b6fab079f75096e0971f877197893f489e1c4
  Author: Vaclav Petras <wenzeslaus at gmail.com>
  Date:   2024-02-08 (Thu, 08 Feb 2024)

  Changed paths:
    M python/grass/gunittest/checkers.py

  Log Message:
  -----------
  grass.gunittest: Add check for precision test (#2818)

Negative precision value does not make sense, so enforce >=0.