message: * remove unnecessary assignments
diff: @@ -373,7 +373,6 @@ pub extern "C" fn strtok_r(
  // Skip past any extra delimiter left over from previous call
  haystack = haystack.add(strspn(haystack, delimiter));
  if *haystack == 0 {
  - haystack = ptr::null_mut();
  *lasts = ptr::null_mut();
  return ptr::null_mut();
  }
  @@ -386,7 +385,6 @@ pub extern "C" fn strtok_r(
  haystack = haystack.add(1);
  *lasts = haystack;
  } else {
  - haystack = ptr::null_mut();
  *lasts = ptr::null_mut();
  }
  