Remove more default arguments.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@80260 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/Sema.h b/lib/Sema/Sema.h
index b193688..45e6669 100644
--- a/lib/Sema/Sema.h
+++ b/lib/Sema/Sema.h
@@ -3371,10 +3371,10 @@
                                                       bool& DerivedToBase);
 
   bool CheckReferenceInit(Expr *&simpleInit_or_initList, QualType declType,
-                          ImplicitConversionSequence *ICS = 0,
-                          bool SuppressUserConversions = false,
-                          bool AllowExplicit = false,
-                          bool ForceRValue = false);
+                          bool SuppressUserConversions,
+                          bool AllowExplicit,
+                          bool ForceRValue,
+                          ImplicitConversionSequence *ICS = 0);
 
   /// CheckCastTypes - Check type constraints for casting between types under
   /// C semantics, or forward to CXXCheckCStyleCast in C++.