crash at return gestureDetector.onTouchEvent(event)

[juha-h]

Sometimes (not everytime) crash happens at return gestureDetector.onTouchEvent(event):

--------- beginning of crash
03-10 19:51:01.999  5776  5776 E AndroidRuntime: FATAL EXCEPTION: main
03-10 19:51:01.999  5776  5776 E AndroidRuntime: Process: com.myapp, PID: 5776
03-10 19:51:01.999  5776  5776 E AndroidRuntime: java.lang.NullPointerException: Parameter specified as non-null is null: method kotlin.jvm.internal.Intrinsics.checkNotNullParameter, parameter e1
03-10 19:51:01.999  5776  5776 E AndroidRuntime: 	at com.myapp.OnSwipeTouchListener$GestureListener.onFling(Unknown Source:2)
03-10 19:51:01.999  5776  5776 E AndroidRuntime: 	at android.view.GestureDetector.onTouchEvent(GestureDetector.java:656)
03-10 19:51:01.999  5776  5776 E AndroidRuntime: 	at com.myapp.OnSwipeTouchListener.onTouch(OnSwipeTouchListener.kt:22)
03-10 19:51:01.999  5776  5776 E AndroidRuntime: 	at android.view.View.dispatchTouchEvent(View.java:12548)