[PATCH] Add a method to get element at in a struct from the C API

[David Blaikie]

Best to delete this review and create a new one, ensuring that one of the
community mailing lists is included in the review from the start.

Unfortunately once you create a review - there's no way to get phab to
re-send this initial email after you add the list :/


http://reviews.llvm.org/D10147

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