Riched20 / winhlp: Crash on specific files if Edit > Copy menu is used

fixme:(base/applications/winhlp32/macro.c:338) ()

Unhandled exception

ExceptionCode:    c0000005

Faulting Address: 00000000

CS:EIP 1b:4a3bf1

DS 23 ES 23 FS 3b GS 0

EAX: 0022da40   EBX: fffffffb   ECX: 0022da4f

EDX: 00000000   EBP: 0022da20   ESI: 00000000   ESP: 0022da18

EDI: 0022da41   EFLAGS: 00010246

Address:

* <msvcrt.dll:43bf1 (dll/win32/msvcrt/string.c:1402 (strcat))> (C:\ReactOS\system32\msvcrt.dll@460000)

Frames:

* <riched20.dll:34a2d (dll/win32/riched20/writer.c:690 (stream_out_para_props))> (C:\ReactOS\System32\riched20.dll@79f40000)

* <riched20.dll:353c7 (dll/win32/riched20/writer.c:1028 (ME_StreamOutRange))> (C:\ReactOS\System32\riched20.dll@79f40000)

* <riched20.dll:4a37 (dll/win32/riched20/clipboard.c:398 (ME_GetDataObject))> (C:\ReactOS\System32\riched20.dll@79f40000)

* <riched20.dll:7aa5 (dll/win32/riched20/editor.c:2346 (editor_copy_or_cut))> (C:\ReactOS\System32\riched20.dll@79f40000)

* <riched20.dll:7b45 (dll/win32/riched20/editor.c:2392 (copy_or_cut))> (C:\ReactOS\System32\riched20.dll@79f40000)

* <riched20.dll:af4b (dll/win32/riched20/editor.c:3675 (editor_handle_message))> (C:\ReactOS\System32\riched20.dll@79f40000)

* <riched20.dll:2e117 (dll/win32/riched20/txtsrv.c:129 (fnTextSrv_TxSendMessage))> (C:\ReactOS\System32\riched20.dll@79f40000)

* <riched20.dll:2c254 (dll/win32/riched20/txthost.c:1506 (RichEditWndProc_common))> (C:\ReactOS\System32\riched20.dll@79f40000)

* <riched20.dll:2d95d (dll/win32/riched20/txthost.c:1532 (RichEditWndProcA))> (C:\ReactOS\System32\riched20.dll@79f40000)

* <user32.dll:6c822 (win32ss/user/user32/windows/wndproc_fixup.S:48 (CALL_EXTERN_WNDPROC))> (C:\ReactOS\system32\user32.dll@77a20000)

* <user32.dll:5e28d (win32ss/user/user32/windows/message.c:1641 (IntCallWindowProcA))> (C:\ReactOS\system32\user32.dll@77a20000)

* <user32.dll:60d95 (win32ss/user/user32/windows/message.c:1826 (CallWindowProcA))> (C:\ReactOS\system32\user32.dll@77a20000)

* <winhlp32.exe:d49e (base/applications/winhlp32/winhelp.c:693 (WINHELP_RicheditWndProc))> (C:\ReactOS\winhlp32.exe@400000)

* <user32.dll:6c822 (win32ss/user/user32/windows/wndproc_fixup.S:48 (CALL_EXTERN_WNDPROC))> (C:\ReactOS\system32\user32.dll@77a20000)

* <user32.dll:60126 (win32ss/user/user32/windows/message.c:1491 (IntCallWindowProcW))> (C:\ReactOS\system32\user32.dll@77a20000)

* <user32.dll:60d3c (win32ss/user/user32/windows/message.c:1798 (IntCallMessageProc))> (C:\ReactOS\system32\user32.dll@77a20000)

* <user32.dll:61951 (win32ss/user/user32/windows/message.c:2403 (SendMessageW))> (C:\ReactOS\system32\user32.dll@77a20000)

* <user32.dll:4ab6e (win32ss/user/user32/windows/dialog.c:2783 (SendDlgItemMessageW))> (C:\ReactOS\system32\user32.dll@77a20000)

* <winhlp32.exe:10339 (base/applications/winhlp32/winhelp.c:1357 (WINHELP_MainWndProc))> (C:\ReactOS\winhlp32.exe@400000)

* <user32.dll:6c822 (win32ss/user/user32/windows/wndproc_fixup.S:48 (CALL_EXTERN_WNDPROC))> (C:\ReactOS\system32\user32.dll@77a20000)

* <user32.dll:60126 (win32ss/user/user32/windows/message.c:1491 (IntCallWindowProcW))> (C:\ReactOS\system32\user32.dll@77a20000)

* <user32.dll:60d3c (win32ss/user/user32/windows/message.c:1798 (IntCallMessageProc))> (C:\ReactOS\system32\user32.dll@77a20000)

* <user32.dll:614c9 (win32ss/user/user32/windows/message.c:2046 (DispatchMessageW))> (C:\ReactOS\system32\user32.dll@77a20000)

* <winhlp32.exe:11178 (base/applications/winhlp32/winhelp.c:1734 (WinMain))> (C:\ReactOS\winhlp32.exe@400000)

* <winhlp32.exe:14bd5 (sdk/lib/crt/startup/crt0_c.c:20 (main))> (C:\ReactOS\winhlp32.exe@400000)

* <winhlp32.exe:14242 (sdk/lib/crt/startup/crtexe.c:311 (__tmainCRTStartup))> (C:\ReactOS\winhlp32.exe@400000)

* <winhlp32.exe:142a0 (sdk/lib/crt/startup/crtexe.c:162 (WinMainCRTStartup))> (C:\ReactOS\winhlp32.exe@400000)

* <kernel32.dll:11e75 (dll/win32/kernel32/client/proc.c:463 (BaseProcessStartup))> (C:\ReactOS\system32\kernel32.dll@7c5e0000)