Moved getting a partition's future mount point into a separate function, so it can be reused by mountvolume.

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@9712 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/storage/DiskDevicePrivate.h

@@ -10,6 +10,7 @@
 #include <DiskDeviceVisitor.h>
 
 class BMessenger;
+class BPath;
 
 namespace BPrivate {
 
@@ -45,10 +46,14 @@ private:
 	partition_id		fID;
 };
 
+status_t get_unique_partition_mount_point(BPartition *partition,
+	BPath *mountPoint);
+
 }	// namespace BPrivate
 
 using BPrivate::PartitionFilter;
 using BPrivate::PartitionFilterVisitor;
 using BPrivate::IDFinderVisitor;
+using BPrivate::get_unique_partition_mount_point;
 
 #endif	// _DISK_DEVICE_PRIVATE_H