message: use default values for gnu library extension fields
  no extra clone
  no mut warning
diff: @@ -83,6 +83,8 @@ struct guest_tm {
  pub tm_wday: c_int, // 24
  pub tm_yday: c_int, // 28
  pub tm_isdst: c_int, // 32
  + pub tm_gmtoff: c_int, // 36
  + pub tm_zone: c_int, // 40
  }
  /// emscripten: _tvset
  @@ -154,7 +156,7 @@ pub extern "C" fn _localtime(time_p: u32, instance: &mut Instance) -> c_int {
  // https://stackoverflow.com/questions/19170721/real-time-awareness-of-timezone-change-in-localtime-vs-localtime-r
  let timespec = unsafe {
  - let mut time_p_addr = instance.memory_offset_addr(0, time_p as _) as *mut i64;
  + let time_p_addr = instance.memory_offset_addr(0, time_p as _) as *mut i64;
  let seconds = *time_p_addr.clone();
  time::Timespec::new(seconds, 0)
  };
  @@ -180,6 +182,8 @@ pub extern "C" fn _localtime(time_p: u32, instance: &mut Instance) -> c_int {
  (*tm_struct_ptr).tm_wday = result_tm.tm_wday;
  (*tm_struct_ptr).tm_yday = result_tm.tm_yday;
  (*tm_struct_ptr).tm_isdst = result_tm.tm_isdst;
  + (*tm_struct_ptr).tm_gmtoff = 0;
  + (*tm_struct_ptr).tm_zone = 0;
  tm_struct_offset as _
  }
  @@ -192,9 +196,8 @@ pub extern "C" fn _localtime_r(time_p: u32, result: u32, instance: &mut Instance
  // https://stackoverflow.com/questions/19170721/real-time-awareness-of-timezone-change-in-localtime-vs-localtime-r
  unsafe {
  - let time_p_addr = instance.memory_offset_addr(0, time_p as _) as *mut i64;
  - let seconds = *time_p_addr.clone();
  - let timespec = time::Timespec::new(seconds, 0);
  + let seconds = instance.memory_offset_addr(0, time_p as _) as *const i64;
  + let timespec = time::Timespec::new(*seconds, 0);
  let result_tm = time::at(timespec);
  // debug!(
  @@ -214,6 +217,8 @@ pub extern "C" fn _localtime_r(time_p: u32, result: u32, instance: &mut Instance
  (*result_addr).tm_wday = result_tm.tm_wday;
  (*result_addr).tm_yday = result_tm.tm_yday;
  (*result_addr).tm_isdst = result_tm.tm_isdst;
  + (*result_addr).tm_gmtoff = 0;
  + (*result_addr).tm_zone = 0;
  result as _
  }
  