[PostGIS] #5784: Export circ_tree_distance_tree_internal and use memset instead of bzero

[PostGIS]

#5784: Export circ_tree_distance_tree_internal and use memset  instead of bzero
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  Reporter:  mschoema   |      Owner:  strk
      Type:  patch      |     Status:  new
  Priority:  medium     |  Milestone:  PostGIS 3.6.0
 Component:  liblwgeom  |    Version:  master
Resolution:             |   Keywords:
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Comment (by mschoema):

 This is my first ticket, so I don't know the correct procedure for this.\\
 I have pushed a commit with the changes to my fork. Let me know if I
 should open a PR.

 https://git.osgeo.org/gitea/mschoema/postgis/commit/958f7e47ffc9108adda7b91938412787b1ce7020
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5784#comment:1>
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