Added padding calculation (not final) so that flattening / unflattening actually works.

Passes all unit tests now and works on Haiku too. Speed is not yet optimized and Message2.cpp is still not cleaned up.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13785 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/app/MessageBody2.h

@@ -67,6 +67,7 @@ public:
 		void				HashClear();
 
 private:
+		status_t			InitCommon();
 		BMessageField		*FindData(const char *name, type_code type,
 								 status_t &error) const;
 

headers/private/app/MessageField2.h

@@ -53,6 +53,7 @@ public:
 
 		bool				IsFixedSize() const { return fFixedSize; };
 		size_t				TotalSize() const { return fTotalSize; };
+		size_t				TotalPadding() const { return fTotalPadding; };
 
 		void				PrintToStream() const;
 
@@ -68,6 +69,7 @@ private:
 		BList				fItems;
 		bool				fFixedSize;
 		size_t				fTotalSize;
+		size_t				fTotalPadding;
 
 		BMessageField		*fNext;
 };