[PATCH] fix acpica in i386 compiling with -O2

this is a quick fix.
===
--- acpi_wakeup.c~      Sun Jul  4 12:42:07 2004
+++ acpi_wakeup.c       Mon Jul  5 11:25:29 2004
_at__at_ -295,6 +295,7 _at__at_
 static void
 acpi_alloc_wakeup_handler(void)
 {
+       void *addr = 0;
        if (!cold)
                return;

_at__at_ -307,11 +308,12 _at__at_
                return;
        }

-       if (bus_dmamem_alloc(acpi_waketag, (void **)&acpi_wakeaddr,
+       if (bus_dmamem_alloc(acpi_waketag, (void **)&addr,
                             BUS_DMA_NOWAIT, &acpi_wakemap)) {
                printf("acpi_alloc_wakeup_handler: can't alloc wake memory\n");
                return;
        }
+       acpi_wakeaddr = (vm_offset_t)addr;
 }

 SYSINIT(acpiwakeup, SI_SUB_KMEM, SI_ORDER_ANY, acpi_alloc_wakeup_handler, 0)