[GRASS-git] [OSGeo/grass] 4e4e38: diglib: fix integer overflow (#2735)

[Markus Metz]

  Branch: refs/heads/main
  Home:   https://github.com/OSGeo/grass
  Commit: 4e4e38f2c43afb1eb5a7c9a558ecfec83349529a
      https://github.com/OSGeo/grass/commit/4e4e38f2c43afb1eb5a7c9a558ecfec83349529a
  Author: Markus Metz <33666869+metzm at users.noreply.github.com>
  Date:   2023-01-09 (Mon, 09 Jan 2023)

  Changed paths:
    M lib/vector/diglib/spindex_rw.c

  Log Message:
  -----------
  diglib: fix integer overflow (#2735)

* fix integer type for estimating file size, avoid compiler warnings