Fix MSVC run-time check after r229391.
Created attachment 335875 [details] Patch
Comment on attachment 335875 [details] Patch r=me.
Comment on attachment 335875 [details] Patch Clearing flags on attachment: 335875 Committed r229648: <https://trac.webkit.org/changeset/229648>
All reviewed patches have been landed. Closing bug.
<rdar://problem/38522190>