Improved AreaPool to have an initial size as well as well as a name that is

used for new area.
MemPool::AddToPool() now gracefully deals with NULL pointers (or a size of 0).
BitmapManager was deleting the area it transferred to AreaPool before - it
no longer needs an extra area, though.
Minor other cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@13260 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/servers/app/BitmapManager.h

@@ -44,7 +44,6 @@ class BitmapManager {
 			void				DeleteBitmap(ServerBitmap* bitmap);
  protected:
 			BList				fBitmapList;
-			area_id				fBitmapArea;
 			int8*				fBuffer;
 			TokenHandler		fTokenizer;
 			BLocker				fLock;