Ensure that null/undefined args don't choke on native indexOf
Ensure that null/undefined args don't choke on native indexOf

Signed-off-by: Rick Waldron <dd8fdbe95c7f81f312b273ef8860922803e9ef16@gmail.com>

jquery/jquery,quiaro/request-agent,isaacs/jquery,eburgos/jquery,isaacs/jquery,rwaldron/jquery,roytoo/jquery,RubyLouvre/jquery,chitranshi/jquery,eburgos/jquery,RubyLouvre/jquery,praveen9102/Shazam,Karyotyper/jquery,roytoo/jquery,demetr84/Jquery,roytoo/jquery,jcutrell/jquery,Karyotyper/jquery,eburgos/jquery,praveen9102/Shazam,jcutrell/jquery,chitranshi/jquery,rwaldron/jquery,jquery/jquery,jquery/jquery,demetr84/Jquery,Karyotyper/jquery