Added isValid(_handle).
Added isValid(_handle).

BlueCrystalLabs/bx,ShuangxueBai/bx,septag/termite,u-engine/bx,fluffyfreak/bx,fluffyfreak/bx,attilaz/bx,dariomanesku/bx,MikePopoloski/bx,ShuangxueBai/bx,septag/termite,coconutxin/bx,mmicko/bx,septag/termite,septag/bx,0-wiz-0/bx,pigpigyyy/bx,dariomanesku/bx,mmicko/bx,attilaz/bx,septag/bx,septag/termite,coconutxin/bx,bkaradzic/bx,septag/termite,u-engine/bx,0-wiz-0/bx,bkaradzic/bx,OlegOAndreev/bx,OlegOAndreev/bx,MikePopoloski/bx,septag/termite,pigpigyyy/bx,BlueCrystalLabs/bx