[PostGIS] #6109: Out-of-bounds heap read in BOX2D_out and BOX2D_expand on 65-byte box2d under ASAN

[PostGIS]

#6109: Out-of-bounds heap read in BOX2D_out and BOX2D_expand on 65-byte box2d
under ASAN
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  Reporter:  dtighe   |      Owner:  pramsey
      Type:  defect   |     Status:  new
  Priority:  medium   |  Milestone:  PostGIS 3.6.5
 Component:  postgis  |    Version:  3.6.x
Resolution:           |   Keywords:
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Comment (by dtighe):

 Have the fix ready, just need to setup a few things to send the PR
 quickly.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6109#comment:1>
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