Recurse with may_block = FALSE, so we don't get into the pathology where

Recurse with may_block = FALSE, so we don't get into the pathology where

Thu Nov  1 21:48:43 2001  Owen Taylor  <otaylor@redhat.com>

        * tests/mainloop-test.c (recurser_idle): Recurse
        with may_block = FALSE, so we don't get into
        the pathology where the recurser_idle recurses
        for 10 iterations, and the only thing that is
        running is the recurser idle, which adds
        another recursion for each of those 10 iterations
        and....

        * tests/mainloop-test.c (create_crawler): Fix race
        condition where a crawler source could be destroyed
        before it was added to the crawler array.

        * test/Makefile.am: Add mainloop-test back.