[469c] UnrealEd crash on attempt delete actor

[SeriousBuggie]

Reproduce:
1 Open mhg_test.zip in UnrealEd
2. Press Delete key (one actor already selected on map, if not - select any)

Expected result: Selected actor deleted.
Actual result: Editor crash.

General protection fault!

History: EndState <- ULevel::DestroyActor <- (MHGSpot MyLevel.MHGSpot11591) <- 
UEditorEngine::edactDeleteSelected <- UEditorEngine::Exec <- (ACTOR DELETE)
SE(C0000005) @ 56EF47F6
fl=0 rec=0 n=1578908544 i[0]=0 i[1]=3f0
eax=00000000 ebx=10f7d704 ecx=1ed66b9c edx=56fc1714 esi=1ed66b9c edi=5e0dce20 eip=56ef47f6
ebp=0123a230 esp=0123a230 cs=0023 ds=002b es=002b fs=0053 gs=002b flags=00010246
In module 'Z:\UT_469c\System\Engine.dll' at address 001347f6
 <- WEditorFrame::OnCommand <- WM_COMMAND

[SeriousBuggie]

	// Send EndState notification.
	guard(EndState);
	if( ThisActor->GetStateFrame() && ThisActor->GetStateFrame()->StateNode && ThisActor->IsProbing(NAME_EndState) )
	{
		ThisActor->eventEndState();
		if( ThisActor->bDeleteMe )
			return 1;
	}
	unguard;

It died somewhere here.

.text:101347F0 ; void __thiscall AActor::ProcessEvent(AActor *this, struct UFunction *, void *, void *)
.text:101347F0                 public ?ProcessEvent@AActor@@UAEXPAVUFunction@@PAX1@Z
.text:101347F0 ?ProcessEvent@AActor@@UAEXPAVUFunction@@PAX1@Z proc near
.text:101347F0                                         ; DATA XREF: .rdata:10201724�o
.text:101347F0                                         ; .rdata:102017F4�o ...
.text:101347F0                 push    ebp
.text:101347F1                 mov     ebp, esp
.text:101347F3                 mov     eax, [ecx+64h]
.text:101347F6                 test    byte ptr [eax+3F0h], 2
.text:101347FD                 jz      short loc_10134806
.text:101347FF                 pop     ebp
.text:10134800                 jmp     ds:__imp_?ProcessEvent@UObject@@UAEXPAVUFunction@@PAX1@Z ; UObject::ProcessEvent(UFunction *,void *,void *)

crash at
.text:101347F6 test byte ptr [eax+3F0h], 2
eax is zero.

void AActor::ProcessEvent( UFunction* Function, void* Parms, void* Result )
{
	guardSlow(AActor::ProcessEvent);
	if( Level->bBegunPlay )
		Super::ProcessEvent( Function, Parms, Result );
	unguardSlow;
}

Level is None.
And in editor it confirmed:

So there fix goes as check Level in ProcessEvent.

But in general, on map load, Level must be set, for each actor, to actual level, for avoid such stuff. Because, I guess, such actors will crash editor in many places.

As manual workaround - select all actors on Level and set Level via actor properties.

[SeriousBuggie]

Exactly this issue happen because of Level field of actor:

class MHGSpot expands Actor;

var() int Seq, Jump, Level;
var() MHGSpot Prev;
var() ScriptedPawn MyMonster[3];

So when engine try set Level field it not goes to proper field and in fact left None.