[GRASS-git] [OSGeo/grass] 7f6c10: v.to.db history support files (#486)

[Huidae Cho]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass
  Commit: 7f6c10cf171fa7ee8ba154841ad2cc09a27d525f
      https://github.com/OSGeo/grass/commit/7f6c10cf171fa7ee8ba154841ad2cc09a27d525f
  Author: Huidae Cho <grass4u at gmail.com>
  Date:   2020-04-04 (Sat, 04 Apr 2020)

  Changed paths:
    M vector/v.to.db/main.c

  Log Message:
  -----------
  v.to.db history support files (#486)

* Vect_open_update => Vect_open_update_head to keep support files

* Vect_open_update_head check