krb5 commit [krb5-1.13]: Remove meaningless checks decoding DB2 principals

[Tom Yu]

https://github.com/krb5/krb5/commit/b8e22cd657bfe9815478268a0ba595007142008f
commit b8e22cd657bfe9815478268a0ba595007142008f
Author: Greg Hudson <ghudson at mit.edu>
Date:   Tue Sep 6 12:58:57 2016 -0400

    Remove meaningless checks decoding DB2 principals
    
    Commit e3d9f03a658e247dbb43cb345aa93a28782fd995 (ticket 8481) added
    several checks for negative length values when decoding DB2 principal
    entries, including two unnecessary checks on unsigned values.  Remove
    those checks as they can generate warnings.
    
    (cherry picked from commit c0f08f2eadbf179ec30008893a125722536c7802)
    
    ticket: 8491
    version_fixed: 1.13.7

 src/plugins/kdb/db2/kdb_xdr.c |    6 ++----
 1 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/src/plugins/kdb/db2/kdb_xdr.c b/src/plugins/kdb/db2/kdb_xdr.c
index 9c2614a..e6a030f 100644
--- a/src/plugins/kdb/db2/kdb_xdr.c
+++ b/src/plugins/kdb/db2/kdb_xdr.c
@@ -364,8 +364,7 @@ krb5_decode_princ_entry(krb5_context context, krb5_data *content,
         krb5_kdb_decode_int16(nextloc, (*tl_data)->tl_data_length);
         nextloc += 2;
 
-        if ((*tl_data)->tl_data_length < 0 ||
-            (*tl_data)->tl_data_length > sizeleft) {
+        if ((*tl_data)->tl_data_length > sizeleft) {
             retval = KRB5_KDB_TRUNCATED_RECORD;
             goto error_out;
         }
@@ -414,8 +413,7 @@ krb5_decode_princ_entry(krb5_context context, krb5_data *content,
                 krb5_kdb_decode_int16(nextloc, key_data->key_data_length[j]);
                 nextloc += 2;
 
-                if (key_data->key_data_length[j] < 0 ||
-                    key_data->key_data_length[j] > sizeleft) {
+                if (key_data->key_data_length[j] > sizeleft) {
                     retval = KRB5_KDB_TRUNCATED_RECORD;
                     goto error_out;
                 }