add check for nil 2nd argument
add check for nil 2nd argument

chef/ffi-yajl,kou/ffi-yajl,chef/ffi-yajl,h4ck3rm1k3/ffi-yajl,kou/ffi-yajl,h4ck3rm1k3/ffi-yajl,chef/ffi-yajl,h4ck3rm1k3/ffi-yajl,kou/ffi-yajl