Extract subchild cleanup to a function.

* No functional change intended.

src/YabInterface.h

@@ -249,6 +249,7 @@
 		BBitmap* loadImage(const char* name);
 		static int compare(BListItem **firstArg, BListItem **secondArg);
 		void CleanupYabTabView(BView* view);
+		void CleanupSubchildView(BView* view);
 
 		BTranslatorRoster *Roster;
 		char ApplicationDirectory[1024];