Added check when no safe-location could be found

src/main/java/eu/ruekov/ruakij/LinkedBeaconTeleporters/listener/OnCustomPlayerMove.java

@@ -84,9 +84,6 @@ public class OnCustomPlayerMove implements CustomPlayerMoveEventListener {
         else{
             // TODO: Check if beacon is active
 
-            // Set player as ignored on target-LinkedBeaconTeleporter (so he wont trigger the teleport again)
-            playerBeaconLocation.put(uuid, lbtBlockPartner);
-
             // Get safe-location on top of other beacon
             Block safeBlock = Function.searchForMaterial(
                     lbtBlockPartner.block().getLocation().add(0, 1, 0),
@@ -94,8 +91,16 @@ public class OnCustomPlayerMove implements CustomPlayerMoveEventListener {
                     Material.AIR,
                     Function.transparentMaterials
             );
+
+            if(safeBlock == null){
+                // No safe location found
+                return;
+            }
             // TODO: Check if there is enough space for a player
 
+            // Set player as ignored on target-LinkedBeaconTeleporter (so he wont trigger the teleport again)
+            playerBeaconLocation.put(uuid, lbtBlockPartner);
+
             // Teleport
             e.player().teleport(
                     safeBlock.getLocation().add(0.5, 0, 0.5)