Tiny change to getInstantFromTime to match the old implementation

The Math.round can at times be a second off. This does not indicate that this way is more accurate. It is simply to allow better comparison to other implementations.

Author: KosherJava

src/main/java/com/kosherjava/zmanim/AstronomicalCalendar.java

@@ -644,7 +644,9 @@ protected Instant getInstantFromTime(double time, SolarEvent solarEvent) {
 	            date = date.minusDays(1);
 	        }
 	    }
-        LocalDateTime dateTime = date.atStartOfDay().plusNanos(Math.round(time * HOUR_MILLIS) * 1_000_000L);
+	    
+        // Math.round(time * HOUR_MILLIS) * 1_000_000L could be used below, but this exactly matches the pre-3.0 Date-based code.
+        LocalDateTime dateTime = date.atStartOfDay().plusNanos((long)(time * HOUR_MILLIS) * 1_000_000L);  
 
 	    // The computed time is in UTC fractional hours; anchor in UTC before converting.
 	    return ZonedDateTime.of(dateTime, ZoneOffset.UTC).toInstant();