Fix FIXME added in r359339

We have windows.h in asan_win.cc, so we can just use the correct
prototypes for these EH-related interceptors without worrying.

Also fix an unused variable warning while I'm here.

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@359500 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed