[patch] Trying to fix __va_list_tag serialization issue (bug 13189)

Hello,

I'm trying to fix a regression with va_list handling in precompiled headers.

http://llvm.org/bugs/show_bug.cgi?id=13189

Can someone tell me if the attached patch is the right approach to solve this type serialization issue.

Thanks

-- Jean-Daniel

va_list.patch (8.85 KB)