REGRESSION: Crash when aborting wine-gecko download in 2nd stage setup

Unhandled exception

ExceptionCode:    c0000005

Faulting Address: 7A97D4D2

CS:EIP 1b:7a97d4d2

DS 23 ES 23 FS 3b GS 0

EAX: 00002000   EBX: 000020a9   ECX: 00000001

EDX: 00000000   EBP: 00efed7c   ESI: 7c24a8fc   ESP: 00efed6c

EDI: 00000744   EFLAGS: 00010246

Address:

<setup.exe:7a97d4d2> (C:\ReactOS\System32\setup.exe@0)

Frames:

<[invalid address]:7a97dab1>

<[invalid address]:7a961f49>

<[invalid address]:7a9627a2>

<[invalid address]:7a963bbc>

<[invalid address]:7a97176c>

<[invalid address]:7a9727a6>

<[invalid address]:7a848ddd>

<[invalid address]:7a841e8e>

<[invalid address]:7a83c359>

<[invalid address]:7a839e95>

<[invalid address]:7a8364ee>

<[invalid address]:7a83a1d2>

<[invalid address]:7a83a609>

<[invalid address]:7a83a02c>

<[invalid address]:7a83a0b4>

<user32.dll:6b33e> (C:\ReactOS\system32\user32.dll@77a20000)

<user32.dll:5f634> (C:\ReactOS\system32\user32.dll@77a20000)

<user32.dll:5fa4e> (C:\ReactOS\system32\user32.dll@77a20000)

<user32.dll:601bf> (C:\ReactOS\system32\user32.dll@77a20000)

<[invalid address]:7a837f25>

<[invalid address]:7a83927b>

<[invalid address]:7a851cea>

<[invalid address]:7a83daf8>

<[invalid address]:63e81644>

<kernel32.dll:1ce3c> (C:\ReactOS\system32\kernel32.dll@7c620000)

err:(win32ss/user/user32/windows/messagebox.c:1048) MessageBox: L"The instruction at \"0x7a97d4d2\" referenced memory at \"0x7a97d4d2\". The memory could not be \"read\".\r\n\nCliquez sur OK pour terminer le programme.\nCliquez sur Annuler pour d\00e9boguer le programme."