* lynx-nat.c (child_wait): Don't restart new threads and loop

    * lynx-nat.c (child_wait): Don't restart new threads and loop
        to the top of child_wait; let the machine independent code in
        wait_for_inferior deal with new thread notifications.

lynx-6100 (partial)
Fixes SEGV when multi-threaded program hits a breakpoint in a new
thread.