Fix lookup of fields from lazy bindings to check if the region is
NULL, not the store, to determine if a lookup succeeded.  The store
can be null if it contained no bindings.  This fixes a false positive
reported to me by a user of the analyzer.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@95679 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed