Reset player velocity on select teleports.

Sets the player fall-distance to 0 before performing a player teleport
during "move player" steps. This should cancel out the any fall damage
that may have built up before the teleport was initiated.

Fixes #698

Co-authored-by: Andreas Troelsen <[email protected]>

src/main/java/com/garbagemule/MobArena/steps/MovePlayerStep.java

@@ -19,11 +19,13 @@ abstract class MovePlayerStep extends PlayerStep {
     public void run() {
         location = player.getLocation();
 
+        player.setFallDistance(0);
         player.teleport(destination.get());
     }
 
     @Override
     public void undo() {
+        player.setFallDistance(0);
         player.teleport(location);
     }
 }