Bump old opendate during reboot to current +1 when mine window has passed.

src/engine/objects/Mine.java

@@ -147,7 +147,12 @@ public class Mine extends AbstractGameObject {
 
 		if (mineOpenDateTime != null)
 			this.openDate = mineOpenDateTime.toLocalDateTime();
-	
+
+		// Set opendate to tomorrow if window has passed
+
+		if (LocalDateTime.now().isAfter(this.openDate.plusHours(1)))
+			this.openDate = LocalDateTime.now().plusDays(1).withHour(this.openDate.getHour()).withMinute(0).withSecond(0).withNano(0);
+
 	}
 
     public static void SendMineAttackMessage(Building mine){