Fix schema support in RT_CreateOveriew

Patch by hypostase
Closes #3615

git-svn-id: http://svn.osgeo.org/postgis/trunk@15078 b70326c6-7e19-0410-871a-916f4a2858ee
1 job for svn-trunk in 24 minutes and 10 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Test
passed #3839833
test

00:24:10