remove mod seconds if layer

pandas/_libs/src/vendored/numpy/datetime/np_datetime.c

@@ -754,21 +754,21 @@ void pandas_timedelta_to_timedeltastruct(npy_timedelta td,
  const npy_int64 per_day = sec_per_day * per_sec;
  npy_int64 ifrac = td;
  const int sign = td < 0 ? -1 : 1;
- const int uneven_in_seconds = td % per_sec != 0;
+ const int uneven_in_seconds = td % per_sec != 0 ? 1 : 0;
  // put frac in seconds
- if (sign < 0 && uneven_in_seconds)
- td = td / per_sec - 1;
- else
- td = td / per_sec;
-
- if (td < 0) {
- // even fraction
- if ((-td % sec_per_day) != 0) {
- out->days = -td / sec_per_day + 1;
- td += sec_per_day * out->days;
- } else {
- td = -td;
+ if (sign < 0) {
+ td = td / per_sec - uneven_in_seconds;
+ if (td < 0) {
+ // even fraction
+ if ((-td % sec_per_day) != 0) {
+ out->days = -td / sec_per_day + 1;
+ td += sec_per_day * out->days;
+ } else {
+ td = -td;
+ }
  }
+ } else {
+ td = td / per_sec;
  }
 
  if (td >= sec_per_day) {