ST_AsMVTGeom: Always return the simplest geometry

Closes #4300


git-svn-id: http://svn.osgeo.org/postgis/branches/2.5@17161 b70326c6-7e19-0410-871a-916f4a2858ee
1 job for svn-2.5 in 24 minutes and 23 seconds (queued for 1 second)
Status Job ID Name Coverage
  Test
passed #146524194
test

00:24:23