[libclang] When doing clang_findReferencesInFile, make sure we don't crash if we come up against a null Decl.
[libclang] When doing clang_findReferencesInFile, make sure we don't crash
if we come up against a null Decl.

No test case unfortunately. rdar://10457799.

git-svn-id: ffe668792ed300d6c2daa1f6eba2e0aa28d7ec6c@146127 91177308-0d34-0410-b5e6-96231b3b80d8

llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,apple/swift-clang,llvm-mirror/clang,llvm-mirror/clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang,apple/swift-clang,llvm-mirror/clang