[GRASS-git] [OSGeo/grass] 83da64: r.mfilter: check return value of write() (#2737)

[Nicklas Larsson]

  Branch: refs/heads/main
  Home:   https://github.com/OSGeo/grass
  Commit: 83da64273709fc8490806e44c96b6fe34158f906
      https://github.com/OSGeo/grass/commit/83da64273709fc8490806e44c96b6fe34158f906
  Author: Nicklas Larsson <n_larsson at yahoo.com>
  Date:   2023-01-10 (Tue, 10 Jan 2023)

  Changed paths:
    M raster/r.mfilter/execute.c

  Log Message:
  -----------
  r.mfilter: check return value of write() (#2737)

addresses -Wunused-result compiler warning