3373 gcc >= 4.5 concerns about offsetof()

*** 55,65 ****
  #define VS_ACCESS_UNDEFINED     0
  #define VS_ACCESS_ALLOW         1       /* return 0 */
  #define VS_ACCESS_DENY          2       /* return EACCES */
  
  #define tolower(C)      (((C) >= 'A' && (C) <= 'Z') ? (C) - 'A' + 'a' : (C))
! #define offsetof(s, m)  (size_t)(&(((s *)0)->m))
  
  /* global variables - tunable via /etc/system */
  uint32_t vs_reqs_max = VS_REQS_DEFAULT; /* max scan requests */
  uint32_t vs_nodes_max = VS_NODES_DEFAULT; /* max in-progress scan requests */
  uint32_t vs_workers = VS_WORKERS_DEFAULT; /* max workers send reqs to vscand */
--- 55,69 ----
  #define VS_ACCESS_UNDEFINED     0
  #define VS_ACCESS_ALLOW         1       /* return 0 */
  #define VS_ACCESS_DENY          2       /* return EACCES */
  
  #define tolower(C)      (((C) >= 'A' && (C) <= 'Z') ? (C) - 'A' + 'a' : (C))
! #if defined(__GNUC__)
! #define offsetof(s, m)  __builtin_offsetof(s, m)
! #else
! #define offsetof(s, m)  ((size_t)(&(((s *)0)->m)))
! #endif
  
  /* global variables - tunable via /etc/system */
  uint32_t vs_reqs_max = VS_REQS_DEFAULT; /* max scan requests */
  uint32_t vs_nodes_max = VS_NODES_DEFAULT; /* max in-progress scan requests */
  uint32_t vs_workers = VS_WORKERS_DEFAULT; /* max workers send reqs to vscand */