[ET Trac] [Einstein Toolkit] #2186: PUGH: support zero sized grid arrays

[Einstein Toolkit]

#2186: PUGH: support zero sized grid arrays
---------------------------------+-----------------------------------
 Reporter:  Roland Haas          |       Type:  defect
   Status:  new                  |   Priority:  minor
Milestone:                       |  Component:  EinsteinToolkit thorn
  Version:  development version  |   Keywords:  PUGH
---------------------------------+-----------------------------------
 if a grid array has size 0 we ignore it during communication by setting
 its ghost size and overlap region to zero, cctk_lsh will show up a zero as
 well

 This fixes the bug that Erik observed in
 https://bitbucket.org/cactuscode/cactustest/commits/8a6601f about 14 years
 ago. As far as I can tell this test has been failing since then and only
 was not caught b/c the testing system actually does not look at the Cactus
 return code.

 Pull request is here: https://bitbucket.org/cactuscode/cactuspugh/pull-
 requests/2/pugh-support-zero-sized-grid-arrays/diff

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Ticket URL: <https://trac.einsteintoolkit.org/ticket/2186>
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