autobuild[sn-devel-144]: intermittent test failure detected

[autobuild]

The autobuild test system (on sn-devel-144) has detected an intermittent failing test in 
the current master tree.

The autobuild log of the failure is available here:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2018-02-01-0225/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2018-02-01-0225/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-144/2018-02-01-0225/samba.stdout
  
The top commit at the time of the failure was:

commit 21eb5169f46b8d819a5d5d028baff581e4e63de6
Author: Volker Lendecke <vl at samba.org>
Date:   Tue Jan 30 12:37:30 2018 +0100

    vfs_virusfilter: Fix CID 1428738 Macro compares unsigned to 0
    
    vsnprintf returns "int" and not "size_t"
    
    Signed-off-by: Volker Lendecke <vl at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Jeremy Allison <jra at samba.org>
    Autobuild-Date(master): Wed Jan 31 05:28:48 CET 2018 on sn-devel-144