Switch the ObjC*Decl raw_stream overloads to take a reference, for consistency with NamedDecls.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@149981 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index f2ebd8c..398e27e 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -433,7 +433,7 @@
 
     if (const ObjCCategoryImplDecl *CID =
         dyn_cast<ObjCCategoryImplDecl>(MD->getDeclContext()))
-      Out << '(' << CID << ')';
+      Out << '(' << *CID << ')';
 
     Out <<  ' ';
     Out << MD->getSelector().getAsString();