[GRASS-git] [OSGeo/grass] 6616da: v.patch: add details into error messages

[Vaclav Petras]

  Branch: refs/heads/master
  Home:   https://github.com/OSGeo/grass
  Commit: 6616daa5c2132ded1a7a4cde568e969d6cfcd87d
      https://github.com/OSGeo/grass/commit/6616daa5c2132ded1a7a4cde568e969d6cfcd87d
  Author: Vaclav Petras <wenzeslaus at gmail.com>
  Date:   2019-08-22 (Thu, 22 Aug 2019)

  Changed paths:
    M vector/v.patch/main.c

  Log Message:
  -----------
  v.patch: add details into error messages

Now the module not only complains, but also provides
some basic info about what is wrong for missing table,
different key column (name), types and number of columns
(which reports, however, still just the numbers, not the actual difference).