[GRASS-git] [OSGeo/grass] 471e4e: r.geomorphon: Fix shape calculations (#1040)

[Denis Ovsienko]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: 471e4eb4ff5dc2c4253f467ac456960c6480ec46
      https://github.com/OSGeo/grass/commit/471e4eb4ff5dc2c4253f467ac456960c6480ec46
  Author: Denis Ovsienko <denis at ovsienko.info>
  Date:   2020-10-23 (Fri, 23 Oct 2020)

  Changed paths:
    M raster/r.geomorphon/geom.c

  Log Message:
  -----------
  r.geomorphon: Fix shape calculations (#1040)

The plugin sometimes produced apparently invalid (several orders of
magnitude off or "not a number") values for elongation and width. Add
missing initializations to shape() in geom.c to fix that and the azimuth
calculation as well: when finding a sum of values, initialize the
holding variable with 0; when finding a minimum or a maximum for a set
of values, initialize the holding variable with the first value.