covscan: free encryption types in case there is an error

Even when a number of translated encryption types is zero, the array
might still be allocated. Call free() in any case as free(NULL) does
nothing.

Fixes: https://pagure.io/freeipa/issue/8131
Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>

client/ipa-getkeytab.c

@@ -512,6 +512,7 @@ static int ldap_get_keytab(krb5_context krbctx, bool generate, char *password,
     if (enctypes) {
         ret = ipa_string_to_enctypes(enctypes, &es, &num_es, err_msg);
         if (ret || num_es == 0) {
+            free(es);
             return LDAP_OPERATIONS_ERROR;
         }
     }