When taping multiple times on nodes

[satyanandt]

E/AndroidRuntime: FATAL EXCEPTION: GLThread 5789
java.lang.IllegalStateException: it must not be null
at br.com.insanitech.spritekit.engine.SKActionEngine.updateChildrenActions(SKActionEngine.kt:25)
at br.com.insanitech.spritekit.engine.SKActionEngine.evaluateActions(SKActionEngine.kt:14)
at br.com.insanitech.spritekit.engine.SKEngine.doUpdateFlow(SKEngine.kt:52)
at br.com.insanitech.spritekit.engine.SKEngine.drawFrame(SKEngine.kt:69)
at br.com.insanitech.spritekit.opengl.renderer.GLRenderer.onDrawFrame(GLRenderer.kt:39)
at br.com.insanitech.spritekit.opengl.renderer.GLGenericRenderer.onDrawFrame(GLGenericRenderer.kt:24)
at android.opengl.GLSurfaceView$GLThread.guardedRun(GLSurfaceView.java:1575)
at android.opengl.GLSurfaceView$GLThread.run(GLSurfaceView.java:1270)

[andersonlucasg3]

Thanks for the report.
Gonna have a look into it.
Feel free to fork and create a pull request as well.