partition gives "You can't copy a file over itself" error).

	* libnautilus-extensions/nautilus-file-operations.c:
	(nautilus_file_operations_copy_move): There was a bug in the call
	to check_same_fs in here (it was passing in the target URI, which
	is often a file that doesn't even exist), so I removed that check.
	Did some other cleanups too.