* After my last change, _IsShareable() was called on the wrong string in the

copy constructors, effectively turning of references completely.
* Since that caused troubles (NetPositive now crashes when started), I
  temporarily disabled references by letting _IsShareable() always return
  false until the issue is resolved.
* _FreePrivateData() now sets the fPrivateData member to NULL, and is also
  safe to be called when fPrivateData is NULL.
* Removed my comment about the threading problem in _Detach() and _DetachWith()
  as that just couldn't happen.
* _Clone() must not use memcpy() as the string pointed to by "data" might not
  be as long as "length".
* LockBuffer() now marks a string as unshareable.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24345 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/support/String.h

@@ -254,8 +254,9 @@ private:
 					const char* with, int32 withLen);
 
 private:
-	inline int32& 	_ReferenceCount();
-	bool			_IsShareable();
+	int32& 			_ReferenceCount();
+	const int32& 	_ReferenceCount() const;
+	bool			_IsShareable() const;
 	void			_FreePrivateData();
 
 	char*			fPrivateData;