Added user_partition_data::content_size field. Small change to support a NULL parameter in _kern_supports_resizing_partition().

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@4129 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/disk_device_manager/ddm_userland_interface.h

@@ -17,6 +17,7 @@ struct user_partition_data {
 	partition_id		shadow_id;
 	off_t				offset;
 	off_t				size;
+	off_t				content_size;
 	uint32				block_size;
 	uint32				status;
 	uint32				flags;
@@ -55,7 +56,7 @@ struct user_disk_device_job_info {
 	disk_job_id		id;
 	uint32			type;
 	partition_id	partition;
-	char			desription[256];
+	char			description[256];
 };
 
 // iterating, retrieving device/partition data

src/kernel/core/disk_device_manager/ddm_userland_interface.cpp

@@ -697,8 +697,6 @@ _kern_supports_resizing_partition(partition_id partitionID,
 								  int32 changeCounter, bool *canResizeContents,
 								  bool *whileMounted)
 {
-	if (!canResizeContents)
-		return false;
 	KDiskDeviceManager *manager = KDiskDeviceManager::Default();
 	// get the partition
 	KPartition *partition = manager->ReadLockPartition(partitionID);
@@ -724,8 +722,10 @@ _kern_supports_resizing_partition(partition_id partitionID,
 		return false;
 	// get the child disk system
 	KDiskSystem *childDiskSystem = partition->DiskSystem();
-	*canResizeContents = (childDiskSystem
-		&& childDiskSystem->SupportsResizing(partition, whileMounted));
+	if (canResizeContents) {
+		*canResizeContents = (childDiskSystem
+			&& childDiskSystem->SupportsResizing(partition, whileMounted));
+	}
 // TODO: Currently we report that we cannot resize the contents, if the
 // partition's disk system is unknown. I found this more logical. It doesn't
 // really matter, though, since the API user can check for this situation.