[analyzer] Don't crash when a construction is followed by an uninitialized variable.

This could happen due to unfortunate CFG coincidences.

PR19579

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@207486 91177308-0d34-0410-b5e6-96231b3b80d8
Run this test through instnamer to stop it failing on non-asserts clang builds.


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@207488 91177308-0d34-0410-b5e6-96231b3b80d8
Make test independent of label. Thanks to Richard Smith for catching this!

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@207489 91177308-0d34-0410-b5e6-96231b3b80d8