[analyzer] Use a stack-based local AGAIN to fix the build for real.

It's a good thing CallEvents aren't created all over the place yet.
I checked all the uses this time and the private copy constructor
/really/ shouldn't cause any more problems.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@160845 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed