ERROR: query string argument of EXECUTE is null

[strk]

Assuming there's no record in topology.topology where name = 'fake' the following queries all throw a "query string argument of EXECUTE is null" message:

select topogeo_addlinestring('fake', 'LINESTRING(0 0, 1 0)');
select topogeo_addpoint('fake', 'POINT(0 0)');
select topogeo_addpolygon('fake', 'POLYGON((0 0,10 0,10 10,0 0))');

[strk]

r9907 for 2.0.1 / r9908 for trunk