LLDB Asserts in ValueObject::UpdateValueIfNeeded on Windows

[llvmbot]

Bugzilla Link	21808
Version	unspecified
OS	Windows NT
Blocks	#22140
Reporter	LLVM Bugzilla Contributor

Extended Description

Repro command line

D:\python_src\Python-2.7.8\PCbuild\python_d.exe D:\src\llvm\tools\lldb\test/dotest.py -q --arch=i686 --executable D:/src/llvm/build/ninja/bin/lldb.exe -s D:/src/llvm/build/ninja/lldb-test-traces -u CXXFLAGS -u CFLAGS -C D:\src\llvm\build\ninja\bin\clang.exe -p TestSBData.py D:\src\llvm\tools\lldb\test\python_api\sbdata