source updates to adjust to:

   See 175462 for the change that broke this & contains all the cleanup for this change (so lots of examples)

   You should rewrite this code as:

   if (ArrayTypeLoc TypeLocIfArray = thisFieldTypeLoc.getAs<ArrayTypeLoc>())

   As per another thread on cfe-commits, this may change in the future to:

   if (Optional<ArrayTypeLoc> TypeLocIfArray = thisFieldTypeLoc.getAs<ArrayTypeLoc>())

modified:   classvisitor.h
modified:   globalcons.h
modified:   memberdumper.h
modified:   rewriter.h