[Diffusion] rL246882: Don't crash on a self-alias declaration

[hfinkel@anl.gov via cfe-commits]

hfinkel added auditors: rjmccall.
hfinkel added a comment.

John is the right auditor for this, not me.


Users:
  hfinkel (Author, Auditor)
  3.7-release (Auditor)
  cfe-commits (Auditor)
  tstellarAMD (Auditor)
  rjmccall (Auditor)

http://reviews.llvm.org/rL246882