[GRASS-git] [OSGeo/grass] e36e8f: r.out.gdal: fix building overviews

[Markus Metz]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: e36e8f859f8b94c28d24cd5ce9f76e744cd90b3a
      https://github.com/OSGeo/grass/commit/e36e8f859f8b94c28d24cd5ce9f76e744cd90b3a
  Author: Markus Metz <33666869+metzm at users.noreply.github.com>
  Date:   2020-09-21 (Mon, 21 Sep 2020)

  Changed paths:
    M raster/r.out.gdal/main.c

  Log Message:
  -----------
  r.out.gdal: fix building overviews

use current GDAL dataset when building overviews for GDAL MEM driver