Description of problem:

Using chntpw for clearing a Windows password does nothing.

Version-Release number of selected component (if applicable):
chntpw-0.99.6-16.110511

How reproducible:
Always

Steps to Reproduce:
1. chntpw -u <user> <sam file>
2. select menu item 1 (clear user password)
3. type "y" (write sam file)
  
Actual results:
User password not cleared, sam file unchanged 

Expected results:
User password should have been cleared

Additional info:
This is due to a bug introduced by a patch named "chntpw-110511-robustness.patch".
Here is the patch to correct the above patch:

diff -r -U 3 chntpw-110511/ntreg.c chntpw-110511.new/ntreg.c
--- chntpw-110511/ntreg.c	2011-11-21 14:42:45.369173605 +0100
+++ chntpw-110511.new/ntreg.c	2011-11-21 14:43:38.045876946 +0100
@@ -197,7 +197,10 @@
    len = strlen(ibuf);
    
    if (len)
+   {
       ibuf[len-1] = 0;
+      --len;
+   }
    
    return len;
 }