[analyzer] Don't try to inline if there's no region for a message receiver.

While usually we'd use a symbolic region rather than a straight-up Unknown,
we can still generate unknowns via array subscripts with symbolic indexes.
(And if this ever changes in the future, we still shouldn't crash.)

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@161059 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed