[gparted] Add TYPE_UNPARTITIONED partition type (#788308)

[Curtis Gedak <gedakc src gnome org>]

commit c10d80a2956c688b397ff561ada673b9e9102bee
Author: Mike Fleetwood <mike fleetwood googlemail com>
Date:   Sat Aug 13 12:25:46 2016 +0100

    Add TYPE_UNPARTITIONED partition type (#788308)
    
    Just adds the enumeration.  Using it will follow.
    
    Bug 788308 - Remove whole_device partition flag

 include/Partition.h |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/include/Partition.h b/include/Partition.h
index 0b6ac87..433d771 100644
--- a/include/Partition.h
+++ b/include/Partition.h
@@ -33,10 +33,11 @@ namespace GParted
        
 
 enum PartitionType {
-       TYPE_PRIMARY            =       0,
-       TYPE_LOGICAL            =       1,
-       TYPE_EXTENDED           =       2,
-       TYPE_UNALLOCATED        =       3 
+       TYPE_PRIMARY       = 0,  // Primary partition on a partitioned drive
+       TYPE_LOGICAL       = 1,  // Logical partition on a partitioned drive
+       TYPE_EXTENDED      = 2,  // Extended partition on a partitioned drive
+       TYPE_UNALLOCATED   = 3,  // Unallocated space on a partitioned drive
+       TYPE_UNPARTITIONED = 4   // Unpartitioned whole drive
 };
 
 enum PartitionStatus {