[gvfs] Update comment stating that it's fine to have a NULL GduDevice

[David Zeuthen <davidz src gnome org>]

commit 28cac0d0e24e8e3f58ef82503b5acedd7fc5b096
Author: David Zeuthen <davidz redhat com>
Date:   Fri Feb 19 11:57:03 2010 -0500

    Update comment stating that it's fine to have a NULL GduDevice
    
    Signed-off-by: David Zeuthen <davidz redhat com>

 monitor/gdu/ggdudrive.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/monitor/gdu/ggdudrive.c b/monitor/gdu/ggdudrive.c
index 72126a0..4607223 100644
--- a/monitor/gdu/ggdudrive.c
+++ b/monitor/gdu/ggdudrive.c
@@ -169,7 +169,9 @@ update_drive (GGduDrive *drive)
   else
     drive->name = gdu_presentable_get_name (drive->presentable);
 
-  /* the GduDevice for an activatable drive (such as RAID) is NULL if the drive is not activated */
+  /* It's perfectly fine to not have a GduDevice - for example, this is the case for non-running
+   * MD RAID arrays as well as LVM2 Volume Group "drives"
+   */
   if (device == NULL)
     {
       g_free (drive->device_file);