Speed up checkQueryError.
Speed up checkQueryError.

hexadecy/mgo,deafgoat/mgo,mcuadros/mgo,mjs/mgo,tmc/mgo,jjz/mgo,dmage/mgo,jackspirou/mgo,SocialExplorerFork/mgo,hexadecy/mgo,tmc/mgo,jjz/mgo,go-mgo/travis-test,DroiTaipei/mgo,dmage/mgo,Yottaa/mgo.v2,jjz/mgo,tmc/mgo,raymondjacobson/mgo,lucasjo/mgo,deafgoat/mgo,mcuadros/mgo,jjz/mgo,jackspirou/mgo,go-mgo/travis-test,henrylee2cn/mgo,Danzeer/mgo,velocity-toolkit/mgo,henrylee2cn/mgo,tchajed/mgo,tmc/mgo,velocity-toolkit/mgo,Yottaa/mgo.v2,lucasjo/mgo,raymondjacobson/mgo,go-mgo/travis-test,dmage/mgo,tobyzxj/mgo,go-mgo/travis-test,gabrielrussell/mgo,lucasjo/mgo,Danzeer/mgo,mjs/mgo,tobyzxj/mgo,henrylee2cn/mgo,tchajed/mgo,tobyzxj/mgo,Danzeer/mgo,DroiTaipei/mgo,DroiTaipei/mgo,mcuadros/mgo,dmage/mgo,raymondjacobson/mgo,tobyzxj/mgo,Yottaa/mgo.v2,roamz/mgo,deafgoat/mgo,tchajed/mgo,SocialExplorerFork/mgo,DroiTaipei/mgo,velocity-toolkit/mgo,mcuadros/mgo,hexadecy/mgo,raymondjacobson/mgo,tchajed/mgo,mjs/mgo,Yottaa/mgo.v2,jackspirou/mgo,jackspirou/mgo,SocialExplorerFork/mgo,velocity-toolkit/mgo,SocialExplorerFork/mgo,gabrielrussell/mgo,tchajed/mgo,deafgoat/mgo,gabrielrussell/mgo,gabrielrussell/mgo,henrylee2cn/mgo,mjs/mgo,Danzeer/mgo,hexadecy/mgo,lucasjo/mgo