[NFC][Sanitizer][Windows] Fix refactoring oversight
Fix mistake in previous commit:
@@ -32,7 +32,7 @@ void __sanitizer::BufferedStackTrace::UnwindImpl(
uptr pc, uptr bp, void *context, bool request_fast, u32 max_depth) {
using namespace __asan;
#if SANITIZER_WINDOWS
- stack->Unwind(max_depth, pc, 0, context, 0, 0, false);
+ Unwind(max_depth, pc, 0, context, 0, 0, false);
#else
AsanThread *t;
size = 0;
