ArrayBoundCheckerV2: don't arbitrarily warn about indexing before the 0-index of a symbolic region.  In many cases that isn't really the base offset.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@129366 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed