pull up r19065 from trunk

pull up r19065 from trunk

 r19065@cathode-dark-space:  jaltman | 2007-01-18 06:35:33 -0500
 ticket: 5394
 tags: pullup

   	sendto_kdc.c: use of a variable index into a dynamically
 	allocated array to determine the sizeof() an object makes
 	it unclear what type of object is involved.  It also requires
 	a runtime check instead of a compile time replacement.
 	Not to mention that it could lead to the evaluation of an
 	uninitialized variable as was done in this case.  Replace
 	sizeof(array index variable) with sizeof(type).

 	memset() the correct data structure.

ticket: 5394
version_fixed: 1.6.1

git-svn-id: svn://anonsvn.mit.edu/krb5/branches/krb5-1-6@19111 dc483132-0cff-0310-8789-dd5450dbe970