[PostGIS] #5947: Crash in ST_ModEdgeHeal

[PostGIS]

#5947: Crash in ST_ModEdgeHeal
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  Reporter:  strk      |      Owner:  strk
      Type:  defect    |     Status:  new
  Priority:  blocker   |  Milestone:  PostGIS 3.5.4
 Component:  topology  |    Version:  3.5.x
Resolution:            |   Keywords:  garden
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Comment (by strk):

 I confirm that using lwalloc instead of lwrealloc when the target
 pointarray has no points fixed this case.
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5947#comment:2>
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