Add CK_NullToMemberPointer and CK_BaseToDerivedMemberPointer cast kinds. Make -ast-dump print out the cast kinds of cast expressions.

llvm-svn: 79787
diff --git a/clang/lib/Sema/Sema.h b/clang/lib/Sema/Sema.h
index 5feee65..1d61992 100644
--- a/clang/lib/Sema/Sema.h
+++ b/clang/lib/Sema/Sema.h
@@ -735,7 +735,8 @@
   bool CheckPointerConversion(Expr *From, QualType ToType);
   bool IsMemberPointerConversion(Expr *From, QualType FromType, QualType ToType,
                                  QualType &ConvertedType);
-  bool CheckMemberPointerConversion(Expr *From, QualType ToType);
+  bool CheckMemberPointerConversion(Expr *From, QualType ToType,
+                                    CastExpr::CastKind &Kind);
   bool IsQualificationConversion(QualType FromType, QualType ToType);
   bool IsUserDefinedConversion(Expr *From, QualType ToType, 
                                UserDefinedConversionSequence& User,