Code review comments from jeffpc

*** 401,410 ****
--- 401,411 ----
  
  #define PRSECFLAGS_VERSION_1            1
  #define PRSECFLAGS_VERSION_CURRENT      PRSECFLAGS_VERSION_1
  typedef struct prsecflags {
          uint32_t pr_version;
+         char pr_pad[4];
          secflagset_t pr_effective;
          secflagset_t pr_inherit;
          secflagset_t pr_lower;
          secflagset_t pr_upper;
  } prsecflags_t;