Fix EnsureIndex test result: bucketSize int => f32
Fix EnsureIndex test result: bucketSize int => f32

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