Fix for PR4074: allow subscripting non-lvalue arrays in C90 mode.

I wasn't originally going to use this approach, but cases like 
test/Sema/expr-comma.c make things difficult.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@70096 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed