Fix a bunch of IndirectFieldDecl-related warnings.

- Negative ChainingSize doesn't make sense, make it unsigned.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@119943 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/libclang/CIndex.cpp b/tools/libclang/CIndex.cpp
index 55331f6..2bc362a 100644
--- a/tools/libclang/CIndex.cpp
+++ b/tools/libclang/CIndex.cpp
@@ -3555,6 +3555,7 @@
   case Decl::TemplateTypeParm:
   case Decl::EnumConstant:
   case Decl::Field:
+  case Decl::IndirectField:
   case Decl::ObjCIvar:
   case Decl::ObjCAtDefsField:
   case Decl::ImplicitParam: