[GRASS-git] [OSGeo/grass] b43bb2: r.cost/r.walk: check return code

[Markus Metz]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass
  Commit: b43bb26631eb37d388618f531e806b6cfb293f9f
      https://github.com/OSGeo/grass/commit/b43bb26631eb37d388618f531e806b6cfb293f9f
  Author: Markus Metz <markus.metz.giswork at gmail.com>
  Date:   2019-05-22 (Wed, 22 May 2019)

  Changed paths:
    M raster/r.cost/main.c
    M raster/r.walk/main.c

  Log Message:
  -----------
  r.cost/r.walk: check return code

Check return codes of Segment_[put|get]() in r.cost+r.walk and exit with a fatal error on failure, avoiding corrupt results.