added a check in the start logic to make sure a boat can't cross the start line prematurely (they will have to go back and go through it again) #fix #refactor

src/main/java/seng302/gameServer/GameState.java

@@ -581,6 +581,10 @@ public class GameState implements Runnable {
      * @param yacht The current yacht to check for
      */
     private Boolean checkStartLineCrossing(ServerYacht yacht) {
+        long timeTillStart = System.currentTimeMillis() - this.getStartTime();
+        if (timeTillStart < 0){
+            return false;
+        }
         Integer currentMarkSeqID = yacht.getCurrentMarkSeqID();
         CompoundMark currentMark = markOrder.getCurrentMark(currentMarkSeqID);
         GeoPoint lastLocation = yacht.getLastLocation();