[GRASS-git] [OSGeo/grass] f54006: r.buildvrt: check if all input maps are NULL-only ...

[Markus Neteler]

  Branch: refs/heads/main
  Home:   https://github.com/OSGeo/grass
  Commit: f5400638312e8d7d8dd09cc03e5fd8e90b20b3fc
      https://github.com/OSGeo/grass/commit/f5400638312e8d7d8dd09cc03e5fd8e90b20b3fc
  Author: Markus Neteler <neteler at gmail.com>
  Date:   2022-02-18 (Fri, 18 Feb 2022)

  Changed paths:
    M raster/r.buildvrt/main.c

  Log Message:
  -----------
  r.buildvrt: check if all input maps are NULL-only (#2220)

Do not continue if all input raster maps only contain no-data.

Fixes 2217