[PostGIS] #6089: wrong node used when adding a new long line

[PostGIS]

#6089: wrong node used when adding a new long line
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  Reporter:  Lars Aksel Opsahl  |      Owner:  strk
      Type:  defect             |     Status:  new
  Priority:  medium             |  Milestone:
 Component:  topology           |    Version:  master
Resolution:                     |   Keywords:  snap
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Changes (by strk):

 * Attachment "snapping-multiple.png" added.

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Ticket URL: <https://trac.osgeo.org/postgis/ticket/6089>
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