MFreeBitmaps [FirstBitmap.w,LastBitmap.w] ; Free/delete all/range of Bitmaps

Allows you to free all, or a range of, chunky Bitmap objects. Chunky Bitmap
objects contain graphics and possibly stencil data, so if you free these objects
the data will be freed also. If you omit the parameters it will free all objects
unconditionally, but if you specify a range of objects to free it will check that
each one exists first and if not will generate an error.