[USETUP]
- Fix a failed partition type assignment, when unpartitioned disk space is converted to an extended partition.
- Rename the extended partition list to logical partition list.
- Add a pointer to an extended partition to the disk entries. And keep it up-to-date when the primary partition list is built or modified.
- Add the 'Unpartitioned space' partiton entry to the logical partition list when an extended partition has been created.
- Remove all logical partition entries when the coresponding extended partition will be deleted.
svn path=/trunk/; revision=63411