* configure.in: Change == to = in test command.
        * configure: Regenerate.

2007-01-11  Paolo Bonzini  <bonzini@gnu.org>

        * warnings.m4: Use m4_expand_once to clear the AC_SUBST'ed variable.
        (ACX_PROG_CC_WARNINGS_ARE_ERRORS): Fix typo.  Add optional 2nd argument.