ObjFW  Diff

	id object = [self objectAtIndex: [array count] - 1];
	[array removeLastItem];
	[object release];

	mutations++;
}

- (void)swapObjectAtIndex: (size_t)index1
	withObjectAtIndex: (size_t)index2
- (void)exchangeObjectAtIndex: (size_t)index1
	    withObjectAtIndex: (size_t)index2
{
	id *objects = [array cArray];
	size_t count = [array count];
	id tmp;

	if (index1 >= count || index2 >= count)
		@throw [OFOutOfRangeException exceptionWithClass: isa];