Objective-C: patch to issue the conversion
warning when property-dot syntax is used
with -Wsign-conversion. // rdar://13855394


git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@181914 91177308-0d34-0410-b5e6-96231b3b80d8
Test commit

git-svn-id: http://llvm.org/svn/llvm-project/cfe/trunk@181915 91177308-0d34-0410-b5e6-96231b3b80d8