Fix the long-range build tool's ability to build mid-air.

worldedit-core/src/main/java/com/sk89q/worldedit/util/Location.java

@@ -208,6 +208,9 @@ public class Location {
      * @return the direction vector
      */
     public Vector3 getDirection() {
+        if (Float.isNaN(getYaw()) && Float.isNaN(getPitch())) {
+            return Vector3.ZERO;
+        }
         double yaw = Math.toRadians(this.getYaw());
         double pitch = Math.toRadians(this.getPitch());
         double xz = Math.cos(pitch);

worldedit-core/src/main/java/com/sk89q/worldedit/util/TargetBlock.java

@@ -189,11 +189,16 @@ public class TargetBlock {
 
     public Location getAnyTargetBlockFace() {
         getAnyTargetBlock();
-        return getCurrentBlock().setDirection(getCurrentBlock().toVector().subtract(getPreviousBlock().toVector()));
+        Location current = getCurrentBlock();
+        if (current != null)
+            return current.setDirection(current.toVector().subtract(getPreviousBlock().toVector()));
+        else
+            return new Location(world, targetPos.toVector3(), Float.NaN, Float.NaN);
     }
 
     public Location getTargetBlockFace() {
-        getAnyTargetBlock();
+        getTargetBlock();
+        if (getCurrentBlock() == null) return null;
         return getCurrentBlock().setDirection(getCurrentBlock().toVector().subtract(getPreviousBlock().toVector()));
     }