Fixed check for duplicate cells being added to the reused cells list.
Fixed check for duplicate cells being added to the reused cells list.

liuchungui/AQGridView,0xced/AQGridView,BlessNeo/AQGridView,BITA-app/AQGridView,beiliubei/AQGridView,BITA-app/AQGridView,ondrejstocek/AQGridView,AlanQuatermain/AQGridView,0xced/AQGridView,shaohung001/AQGridView,beiliubei/AQGridView,shabbirh/AQGridView,liulinjian/AQGridView,shenhzou654321/AQGridView,UIKit0/AQGridView,kundanjadhav/AQGridView,howandhao/AQGridView