Added additional checks for DOM nodes and window to isPlainObject, IE 8 was still letting those pass through. Fixes #5669.
Added additional checks for DOM nodes and window to isPlainObject, IE 8 was still letting those pass through. Fixes #5669.

fat/jquery,kpozin/jquery-nodom,RubyLouvre/jquery,jquery/jquery,chitranshi/jquery,roytoo/jquery,npmcomponent/component-jquery,kpozin/jquery-nodom,quiaro/request-agent,jcutrell/jquery,roytoo/jquery,dtjm/jquery,gnarf/jquery,RubyLouvre/jquery,diracdeltas/jquery,ilyakharlamov/jquery-xul,praveen9102/Shazam,npmcomponent/component-jquery,rwaldron/jquery,praveen9102/Shazam,jquery/jquery,fat/jquery,isaacs/jquery,rwaldron/jquery,demetr84/Jquery,diracdeltas/jquery,diracdeltas/jquery,jquery/jquery,eburgos/jquery,Karyotyper/jquery,dtjm/jquery,eburgos/jquery,Karyotyper/jquery,jcutrell/jquery,Karyotyper/jquery,mislav/jquery,sancao2/jquery,demetr84/Jquery,scottjehl/jquery,ilyakharlamov/jquery-xul,mislav/jquery,scottjehl/jquery,eburgos/jquery,hoorayimhelping/jquery,sancao2/jquery,roytoo/jquery,isaacs/jquery,sancao2/jquery,hoorayimhelping/jquery,gnarf/jquery,chitranshi/jquery