[gnome-disk-utility/udisks2-port] Don't allow empty restoring disk images

[David Zeuthen <davidz src gnome org>]

commit 554971c0816e7dfc8f1d0971869d595a293c5b1a
Author: David Zeuthen <davidz redhat com>
Date:   Fri Jan 20 11:57:56 2012 -0500

    Don't allow empty restoring disk images
    
    Signed-off-by: David Zeuthen <davidz redhat com>

 src/palimpsest/gdurestorediskimagedialog.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/src/palimpsest/gdurestorediskimagedialog.c b/src/palimpsest/gdurestorediskimagedialog.c
index c96d961..35fca0b 100644
--- a/src/palimpsest/gdurestorediskimagedialog.c
+++ b/src/palimpsest/gdurestorediskimagedialog.c
@@ -161,7 +161,11 @@ restore_disk_image_update (RestoreDiskImageData *data)
 
       if (data->block_size > 0)
         {
-          if (size < data->block_size)
+          if (size == 0)
+            {
+              restore_error = g_strdup (_("Cannot restore image of size 0"));
+            }
+          else if (size < data->block_size)
             {
               /* Only complain if slack is bigger than 1MB */
               if (data->block_size - size > 1000L*1000L)