libgss leaks, UMRs

libgss leaks, UMRs

	* init_sec_context.c (krb5_gss_init_sec_context): Free
	default_enctypes to avoid leaking returned value from
	krb5_get_tgs_ktypes.

	* k5unseal.c (kg_unseal_v1): Explicitly set token.value to NULL if
	token.length == 0, to avoid spurious uninitialized memory
	references when calling memcpy() with a zero length.

ticket: new
target_version: 1.3
tags: pullup
component: krb5-libs
cc: Kent_Wu@trendmicro.com

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@15619 dc483132-0cff-0310-8789-dd5450dbe970