crash when moving an event to other day

[mnalis]

when editing the event to change its date&time, Etar 1.0.47 (from F-droid) crashed:

FATAL EXCEPTION: main
Process: ws.xsoh.etar, PID: 28720
java.lang.ArrayIndexOutOfBoundsException: length=25; index=-1
	at com.android.calendar.DayView.drawHours(DayView.java:2525)
	at com.android.calendar.DayView.onDraw(DayView.java:2254)
	at android.view.View.draw(View.java:25177)
	at android.view.View.updateDisplayListIfDirty(View.java:24036)
	at android.view.View.draw(View.java:24907)
	at android.view.ViewGroup.drawChild(ViewGroup.java:4780)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4538)
	at android.view.View.updateDisplayListIfDirty(View.java:24022)
	at android.view.View.draw(View.java:24907)
	at android.view.ViewGroup.drawChild(ViewGroup.java:4780)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4538)
	at android.view.View.draw(View.java:25180)
	at android.view.View.updateDisplayListIfDirty(View.java:24036)
	at android.view.View.draw(View.java:24907)
	at android.view.ViewGroup.drawChild(ViewGroup.java:4780)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4538)
	at android.view.View.updateDisplayListIfDirty(View.java:24022)
	at android.view.View.draw(View.java:24907)
	at android.view.ViewGroup.drawChild(ViewGroup.java:4780)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4538)
	at android.view.View.updateDisplayListIfDirty(View.java:24022)
	at android.view.View.draw(View.java:24907)
	at android.view.ViewGroup.drawChild(ViewGroup.java:4780)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4538)
	at android.view.View.updateDisplayListIfDirty(View.java:24022)
	at android.view.View.draw(View.java:24907)
	at android.view.ViewGroup.drawChild(ViewGroup.java:4780)
	at androidx.coordinatorlayout.widget.CoordinatorLayout.drawChild(CoordinatorLayout.java:1277)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4538)
	at android.view.View.updateDisplayListIfDirty(View.java:24022)
	at android.view.View.draw(View.java:24907)
	at android.view.ViewGroup.drawChild(ViewGroup.java:4780)
	at androidx.drawerlayout.widget.DrawerLayout.drawChild(DrawerLayout.java:1478)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4538)
	at android.view.View.draw(View.java:25180)
	at android.view.View.updateDisplayListIfDirty(View.java:24036)
	at android.view.View.draw(View.java:24907)
	at android.view.ViewGroup.drawChild(ViewGroup.java:4780)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4538)
	at android.view.View.updateDisplayListIfDirty(View.java:24022)
	at android.view.View.draw(View.java:24907)
	at android.view.ViewGroup.drawChild(ViewGroup.java:4780)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4538)
	at android.view.View.updateDisplayListIfDirty(View.java:24022)
	at android.view.View.draw(View.java:24907)
	at android.view.ViewGroup.drawChild(ViewGroup.java:4780)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4538)
	at android.view.View.updateDisplayListIfDirty(View.java:24022)
	at android.view.View.draw(View.java:24907)
	at android.view.ViewGroup.drawChild(ViewGroup.java:4780)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4538)
	at android.view.View.updateDisplayListIfDirty(View.java:24022)
	at android.view.View.draw(View.java:24907)
	at android.view.ViewGroup.drawChild(ViewGroup.java:4780)
	at android.view.ViewGroup.dispatchDraw(ViewGroup.java:4538)
	at com.android.internal.policy.DecorView.dispatchDraw(DecorView.java:1179)
	at android.view.View.draw(View.java:25180)
	at com.android.internal.policy.DecorView.draw(DecorView.java:1161)
	at android.view.View.updateDisplayListIfDirty(View.java:24036)
	at android.view.ThreadedRenderer.updateViewTreeDisplayList(ThreadedRenderer.java:768)
	at android.view.ThreadedRenderer.updateRootDisplayList(ThreadedRenderer.java:774)
	at android.view.ThreadedRenderer.draw(ThreadedRenderer.java:872)
	at android.view.ViewRootImpl.draw(ViewRootImpl.java:6051)
	at android.view.ViewRootImpl.performDraw(ViewRootImpl.java:5706)
	at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:4795)
	at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:3288)
	at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:11344)
	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1689)
	at android.view.Choreographer$CallbackRecord.run(Choreographer.java:1698)
	at android.view.Choreographer.doCallbacks(Choreographer.java:1153)
	at android.view.Choreographer.doFrame(Choreographer.java:1079)
	at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:1646)
	at android.os.Handler.handleCallback(Handler.java:958)
	at android.os.Handler.dispatchMessage(Handler.java:99)
	at android.os.Looper.loopOnce(Looper.java:230)
	at android.os.Looper.loop(Looper.java:319)
	at android.app.ActivityThread.main(ActivityThread.java:8919)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:578)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1103)