jump tree conditional body logic

src/main/java/electrosphere/entity/state/movement/jump/ServerJumpTree.java

@@ -85,11 +85,13 @@ public class ServerJumpTree implements BehaviorTree {
                 this.setCurrentJumpForce(currentJumpForce * jumpFalloff);
                 //stop body falling if it is
                 DBody body = PhysicsEntityUtils.getDBody(parent);
+                if(body != null){
                     DVector3C linearVelocity = body.getLinearVel();
                     body.setLinearVel(linearVelocity.get0(), 0, linearVelocity.get2());
                     //push parent up
                     body.addForce(0, currentJumpForce, 0);
                     body.enable();
+                }
                 //potentially disable
                 if(currentFrame >= jumpFrames){
                     this.setState(JumpState.AWAITING_LAND);