broken because the end location of the parameter was the end location of the default arg,
resulting in a source range that could begin in one file and end in another.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@136572 91177308-0d34-0410-b5e6-96231b3b80d8
Argyrios Kyrtzidis