[GRASS-git] [OSGeo/grass-addons] 4d9b82: i.edge: replace confusing error message with empty...

[Markus Neteler]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass-addons
  Commit: 4d9b82e03a8eb25aaff42bb1b054b20dc1de1fd5
      https://github.com/OSGeo/grass-addons/commit/4d9b82e03a8eb25aaff42bb1b054b20dc1de1fd5
  Author: Markus Neteler <neteler at gmail.com>
  Date:   2021-02-27 (Sat, 27 Feb 2021)

  Changed paths:
    M grass7/imagery/i.edge/main.c

  Log Message:
  -----------
  i.edge: replace confusing error message with empty input

- Change confusing error message in case of running command with empty input
   from: `G_fatal_error(_("Nothing read from map %d"), check_reading);`
   to: `G_fatal_error(_("Input map contains no data"));`

- activate raster history
- change C++ style comments to C style
- remove superfluous empty lines