Fix a rewriter crash when the whole body of a foreach is itself 
rewritten, as in Sema/rewrite-foreach-6.m.  Fariborz/Steve,
please review this to see if it is sane.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@46600 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed