[GRASS-git] [OSGeo/grass] 164b65: r.out.gdal: fix building overviews

[Markus Metz]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass
  Commit: 164b658f1a1492889dbcb27b19ed4497b4e83e56
      https://github.com/OSGeo/grass/commit/164b658f1a1492889dbcb27b19ed4497b4e83e56
  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:
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  r.out.gdal: fix building overviews

use current GDAL dataset when building overviews for GDAL MEM driver