[PostGIS] #5922: TopoGeo_AddLineString crash on empty

[PostGIS]

#5922: TopoGeo_AddLineString crash on empty
----------------------+---------------------------
 Reporter:  robe      |      Owner:  strk
     Type:  defect    |     Status:  new
 Priority:  critical  |  Milestone:  PostGIS 3.5.4
Component:  topology  |    Version:  3.4.x
 Keywords:            |
----------------------+---------------------------
 {{{
 SELECT CreateTopology('test', 4326);
 SELECT TopoGeo_AddLineString('test', ST_GeomFromText('LINESTRING
 EMPTY',4326), 20.1);
 }}}

 Not sure how far back you want to patch this, I didn't check 3.5 and below
-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/5922>
PostGIS <http://trac.osgeo.org/postgis/>
The PostGIS Trac is used for bug, enhancement & task tracking, a user and developer wiki, and a view into the subversion code repository of PostGIS project.