Makefile.in: "make check" depends on krb5_decode_test and

Makefile.in: "make check" depends on krb5_decode_test and
	krb5_encode_test being up to date.

ktest_equal.c: Don't segfault if one of the arguments is NULL and the
	other is not in array_compare.

krb5_decode_test.c: Use krb5_init_ets() instead of explicitly naming
	the error tables to initialize.

utility.c: Remove unused routine, and return EINVAL instead of
	ASN1_PARSE_ERROR in krb5_data_hex_parse, since the ASN1 error codes
	aren't defined if the ISODE routines are being used.

git-svn-id: svn://anonsvn.mit.edu/krb5/trunk@4534 dc483132-0cff-0310-8789-dd5450dbe970