Moved the kMessageHeaderMagic constant into the class. Made BMessage a friend of KMessage.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@11059 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/util/KMessage.h

@@ -100,6 +100,7 @@ public:
 
 private:
 	friend class KMessageField;
+	friend class BMessage;		// not so nice, but makes things easier
 
 	struct Header {
 		uint32		magic;
@@ -141,6 +142,8 @@ private:
 	int32			fBufferCapacity;
 	uint32			fFlags;
 	int32			fLastFieldOffset;
+
+	static const uint32	kMessageHeaderMagic;
 };
 
 // KMessageField

src/kernel/core/util/KMessage.cpp

@@ -24,9 +24,11 @@
 #	endif
 #endif
 
-static const uint32 kMessageHeaderMagic = 'kMsG';
 static const int32 kMessageReallocChunkSize = 64;
 
+// kMessageHeaderMagic
+const uint32 KMessage::kMessageHeaderMagic = 'kMsG';
+
 // _Align
 static inline
 int32