[PostGIS] #5948: MakeTopologyPrecise can turn edges into EMPTY

[PostGIS]

#5948: MakeTopologyPrecise can turn edges into EMPTY
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 Reporter:  strk      |      Owner:  strk
     Type:  defect    |     Status:  new
 Priority:  blocker   |  Milestone:  PostGIS 3.6.0
Component:  topology  |    Version:  master
 Keywords:            |
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 When the gridSize passed to MakeTopologyPrecise is larger than the extent
 of an edge, that edge turns to EMPTY, which in turn creates a lot of
 problems. I don't see any reason to allow for that and would prefer an
 exception in that case.

 The function is new in 3.6.0

 Note that empty edges are the likely cause of crashers #5946 #5947 and
 #5925
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5948>
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