Picking sometimes fails

The issue is that null values make their way into start/finish picLocs.
I suspect this is when you start picking (pressing g in my case) when the cursor is outside of the window (or maybe the cursor is on top of another panel).

java.lang.NullPointerException
	at com.jme3.math.Vector3f.subtract(Vector3f.java:683)
	at com.jme3.gde.scenecomposer.tools.PickManager.getTranslation(PickManager.java:185)
	at com.jme3.gde.scenecomposer.tools.PickManager.getTranslation(PickManager.java:195)
	at com.jme3.gde.scenecomposer.tools.shortcuts.MoveShortcut.mouseMoved(MoveShortcut.java:160)
	at com.jme3.gde.scenecomposer.SceneComposerToolController.doEditToolMoved(SceneComposerToolController.java:239)
	at com.jme3.gde.scenecomposer.ComposerCameraController.checkMoved(ComposerCameraController.java:105)
	at com.jme3.gde.core.scene.controller.AbstractCameraController.update(AbstractCameraController.java:514)
	at com.jme3.app.state.AppStateManager.update(AppStateManager.java:287)
[catch] at com.jme3.gde.core.scene.SceneApplication.update(SceneApplication.java:305)
	at com.jme3.system.awt.AwtPanelsContext.updateInThread(AwtPanelsContext.java:200)
	at com.jme3.system.awt.AwtPanelsContext.access$100(AwtPanelsContext.java:45)
	at com.jme3.system.awt.AwtPanelsContext$AwtPanelsListener.update(AwtPanelsContext.java:69)
	at com.jme3.system.lwjgl.LwjglOffscreenBuffer.runLoop(LwjglOffscreenBuffer.java:125)
	at com.jme3.system.lwjgl.LwjglOffscreenBuffer.run(LwjglOffscreenBuffer.java:156)
	at java.lang.Thread.run(Thread.java:748)

If someone is bored and wants to try it out, a way to reproduce this would help fixing it (because just ignoring this exception does not really help)

Edit: This seems to choke the sdk though, I've had this exception multiple times, however could recover. Not sure what happens there :/

Start in PickManager.java at getTranslation, then follow the call from MoveShortcut.java mouseMoved shown in the stack trace. Reproduce picking with the cursor outside the window or over another panel and inspect how null start/finish picLocs arise. Done means picking no longer throws the reported NullPointerException and the SDK remains usable afterward.