illumos gate

Build errors with NULL pointer:

    In file included from ../../common/sys/param.h:48:0,
                     from ../../common/sys/t_lock.h:38,
                     from ../../common/sys/thread.h:36,
                     from ../../common/sys/modctl.h:35,
                     from ../../common/io/scsi/targets/sgen.c:40:
    ../../common/io/scsi/targets/sgen.c: In function 'sgen_do_attach':
    ../../common/sys/null.h:32:14: error: passing argument 6 of 'ddi_create_minor_node' makes integer from pointer without a cast [-Werror=int-conversion]
     #define NULL ((void *)0)
                  ^
    ../../common/io/scsi/targets/sgen.c:635:29: note: in expansion of macro 'NULL'
          instance, DDI_NT_SGEN, NULL) == DDI_FAILURE) {
                                 ^~~~
    In file included from ../../common/sys/scsi/scsi_types.h:61:0,
                     from ../../common/sys/scsi/scsi.h:36,
                     from ../../common/io/scsi/targets/sgen.c:42:
    ../../common/sys/sunddi.h:1564:1: note: expected 'int' but argument is of type 'void *'
     ddi_create_minor_node(dev_info_t *dip, char *name, int spec_type,
     ^~~~~~~~~~~~~~~~~~~~~
    cc1: all warnings being treated as errors