pull up r18669 from trunk

pull up r18669 from trunk

 r18669@cathode-dark-space:  rra | 2006-10-07 23:22:48 -0400
 Ticket: new
 Subject: Initialize buffer before calling res_ninit
 Component: krb5-libs
 Version_Reported: 1.5.1
 Target_Version: 1.5.2
 Tags: pullup

 Per Paul Vixie: It is necessary to zero out the statbuf before calling
 res_ninit(), or else res_vinit() will call res_nclose() and res_ndestroy()
 with stack trash as a statbuf, and they will call free() with stack trash,
 and programs will dump core.

ticket: 4500
version_fixed: 1.5.2

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-5@18742 dc483132-0cff-0310-8789-dd5450dbe970