illumos gate

NULL pointer errors:

    ../../common/io/rlmod.c: In function 'rlmodrmsg':
    ../../common/io/rlmod.c:891:13: error: return makes integer from pointer without a cast [-Werror=int-conversion]
          return (NULL);
                 ^
    ../../common/io/rlmod.c:947:14: error: return makes integer from pointer without a cast [-Werror=int-conversion]
           return (NULL);
                  ^
    ../../common/io/rlmod.c:981:11: error: return makes integer from pointer without a cast [-Werror=int-conversion]
        return (NULL);
               ^
    ../../common/io/rlmod.c: In function 'rlwinsetup':
    ../../common/io/rlmod.c:1057:25: error: comparison between pointer and integer [-Werror]
      if ((rlwinctl(q, mp1)) == NULL) {
                             ^~
    In file included from ../../common/sys/param.h:48:0,
                     from ../../common/io/rlmod.c:42:
    ../../common/io/rlmod.c: In function 'rlmodwioctl':
    ../../common/sys/null.h:32:14: error: passing argument 3 of 'miocack' makes integer from pointer without a cast [-Werror=int-conversion]
     #define NULL ((void *)0)
                  ^
    ../../common/io/rlmod.c:1252:18: note: in expansion of macro 'NULL'
       miocack(q, mp, NULL, 0);
                      ^~~~
    In file included from ../../common/io/rlmod.c:45:0:
    ../../common/sys/strsun.h:63:13: note: expected 'int' but argument is of type 'void *'
     extern void miocack(queue_t *, mblk_t *, int, int);
                 ^~~~~~~
    cc1: all warnings being treated as errors