[GRASS-git] [OSGeo/grass] 951d8a: i.vi: fix PVI formula (#1985)

[Ondrej Pesek]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: 951d8a873c223dafc7496f522f94185142d973db
      https://github.com/OSGeo/grass/commit/951d8a873c223dafc7496f522f94185142d973db
  Author: Ondrej Pesek <pesej.ondrek at gmail.com>
  Date:   2021-11-28 (Sun, 28 Nov 2021)

  Changed paths:
    M imagery/i.vi/pvi.c

  Log Message:
  -----------
  i.vi: fix PVI formula (#1985)

* Fix wrong mathematical formula in the PVI index computation in i.vi

* fix #1984