Fixed NullPointerException in Spline and Sweep brush

worldedit-core/src/main/java/com/boydti/fawe/object/brush/sweep/SweepBrush.java

@@ -46,7 +46,7 @@ public class SweepBrush implements Brush, ResettableTool {
             return;
         }
 
-        boolean newPos = !position.equals(this.position);
+        boolean newPos = this.position == null || !position.equals(this.position);
         this.position = position;
         Player player = editSession.getPlayer();
         if (player == null) {

worldedit-core/src/main/java/com/boydti/fawe/object/visitor/DFSVisitor.java

@@ -104,7 +104,7 @@ public abstract class DFSVisitor implements Operation {
                         from.getZ() + direction.getZ());
                 if (isVisitable(bv, bv2)) {
                     Node adjacent = new Node(bv2.getBlockX(), bv2.getBlockY(), bv2.getBlockZ());
-                    if (!adjacent.equals(current.from)) {
+                    if (current.from == null || !adjacent.equals(current.from)) {
                         AtomicInteger adjacentCount = visited.get(adjacent);
                         if (adjacentCount == null) {
                             if (countAdd++ < maxBranch) {