[GRASS-git] [OSGeo/grass] 8c1bbf: Update gis.h

[Markus Metz]

  Branch: refs/heads/releasebranch_7_6
  Home:   https://github.com/OSGeo/grass
  Commit: 8c1bbf93c965512e05f13ad653bfcc387a5190e8
      https://github.com/OSGeo/grass/commit/8c1bbf93c965512e05f13ad653bfcc387a5190e8
  Author: Markus Metz <33666869+metzm at users.noreply.github.com>
  Date:   2020-01-12 (Sun, 12 Jan 2020)

  Changed paths:
    M include/gis.h

  Log Message:
  -----------
  Update gis.h

GRASS_VERSION_STRING is a macro not a literal string