Fix supports_cte_in_subqueries? on PostgreSQL < 8.4
Fix supports_cte_in_subqueries? on PostgreSQL < 8.4

beni55/sequel,gferguson-gd/sequel,dennis-d/custom_sequel,offshore-safety/sequel,mpalmer/sequel,dennis-d/custom_sequel,seeARMS/sequel,seeARMS/sequel,pfarrell/sequel,nicohvi/sequel,freshpay/sequel,davidbegin/sequel,knut2/sequel,beni55/sequel,gferguson-gd/sequel,offshore-safety/sequel,mpalmer/sequel,reubano/sequel,davidbegin/sequel,freshpay/sequel,uhoh-itsmaciek/sequel,yazshel/sequel,offshore-safety/sequel,pfarrell/sequel,nicohvi/sequel,Marketcircle/sequel,nju520/sequel,knut2/sequel,chef/sequel,uhoh-itsmaciek/sequel,reubano/sequel,bigfix/sequel,t-morgan/sequel,nju520/sequel,yazshel/sequel,t-morgan/sequel