expr.c (expand_expr, [...]): All cleanups have to be protected by interim exception...

expr.c (expand_expr, [...]): All cleanups have to be protected by interim exception handling code.

        * expr.c (expand_expr, defer_cleanups_to, expand_cleanups_to): All
        cleanups have to be protected by interim exception handling code.
        * stmt.c (expand_decl_cleanup, expand_cleanups): Ditto.
        * toplev.c (interim_eh_hook): Hook for interim exception handling.
        * toplev.c (interim_eh): Default implementation for exception
        handling that does nothing.
        * toplev.c (main): Set default for interim_eh_hook.

From-SVN: r7666