pad.c:pad_findmy_pvn: Skip ‘our’ hack for subs

pad.c:pad_findmy_pvn: Skip ‘our’ hack for subs

There is a hack that allows an ‘our’ variable to be found in the pad
in the statement in which it is declared, to avoid a warning (since
the fallback would be to look up the very same variable in the current
package anyway).

Since the warning this hack avoids doesn’t apply to subroutines, we
can just skip it for subroutine lookup.