Patch by Alex Wilson:

* Added archiving/unarchving support.
* Coding style cleanup (some more by myself).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37547 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/os/interface/SpaceLayoutItem.h

@@ -12,6 +12,7 @@ class BSpaceLayoutItem : public BLayoutItem {
 public:
 								BSpaceLayoutItem(BSize minSize, BSize maxSize,
 									BSize preferredSize, BAlignment alignment);
+								BSpaceLayoutItem(BMessage* archive);
 	virtual						~BSpaceLayoutItem();
 
 	static	BSpaceLayoutItem*	CreateGlue();
@@ -34,6 +35,9 @@ public:
 	virtual	BRect				Frame();
 	virtual	void				SetFrame(BRect frame);
 
+	virtual	status_t			Archive(BMessage* into, bool deep = true) const;
+	static	BArchivable*		Instantiate(BMessage* from);
+
 private:
 			BRect				fFrame;
 			BSize				fMinSize;