changes from feedback

Author: devnexen

ext/calendar/gregor.c

@@ -160,12 +160,13 @@ void SdnToGregorian(
 	/* Calculate the century (year/100). */
 	century = temp / DAYS_PER_400_YEARS;
 
+	/* Calculate the year and day of year (1 <= dayOfYear <= 366). */
+	temp = ((temp % DAYS_PER_400_YEARS) / 4) * 4 + 3;
+
 	if (century > ((INT_MAX / 100) - (temp / DAYS_PER_4_YEARS))) {
 		goto fail;
 	}
 
-	/* Calculate the year and day of year (1 <= dayOfYear <= 366). */
-	temp = ((temp % DAYS_PER_400_YEARS) / 4) * 4 + 3;
 	year = (century * 100) + (temp / DAYS_PER_4_YEARS);
 	dayOfYear = (temp % DAYS_PER_4_YEARS) / 4 + 1;