Fix PR19066 - 0-sized vftable in the presence of virtual inheritance

Reviewed at http://llvm-reviews.chandlerc.com/D3181

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204786 91177308-0d34-0410-b5e6-96231b3b80d8
Make the 'for (auto ...)' names more readable

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@204787 91177308-0d34-0410-b5e6-96231b3b80d8