Not that there should be any need to use it here; it is the default anyway.

Also the extern "C" is bogus here as far as I know; that affects only the
external name of the function, and that a function is passed to bsearch()
doesn't set any requirements on the external name of it. It could be a static
function with no global symbol name. But oh well.

Change-Id: Ia264bf2f952fd6f38aa36a25a084383d4d3f1bdc