- remove the object from the list

- fixes a bug when deleting a drive, then adding a new one directly after

svn path=/trunk/tools/RosTE/; revision=266

GUI/VirtualMachine.cs

@@ -506,6 +506,7 @@ namespace RosTEGUI
 
         public void DeleteHardDisk(VMHardDrive vmhd)
         {
+            hardDrives.Remove(vmhd);
             vmhd.DeleteHardDrive(vmhd.DiskID);
         }