[analyzer] ObjC message sends to nil receivers that return structs are now okay (compiler zeroes out the data).  Fixes <rdar://problem/9151319>.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@143215 91177308-0d34-0410-b5e6-96231b3b80d8
3 files changed