Fix warning causing error in warning as error (dotnet/coreclr#21557)

Fix warning causing error in warning as error (dotnet/coreclr#21557)

c:\github\coreclr\src\vm\excep.cpp(4489):
error C2220: warning treated as error - no 'object' file generated

[C:\GitHub\coreclr\bin\obj\Windows_NT.x64.Release\src\vm\wks\cee_wks.vcxproj]
c:\github\coreclr\src\vm\excep.cpp(4489):
warning C4800: 'BOOL': forcing value to bool 'true' or 'false'
(performance warning)
[C:\GitHub\coreclr\bin\obj\Windows_NT.x64.Release\src\vm\wks\cee_wks.vcxproj]

Commit migrated from https://github.com/dotnet/coreclr/commit/a41039e66e8f36acd739c3935f9690b21303746f