tests/instantiating: test the unlinked keyid

Testing the `0` ID just repeats the "BAD KEY" tests at the beginning of
the file.

Signed-off-by: Ben Boeckel <mathstuf@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
diff --git a/tests/keyctl/instantiating/bad-args/runtest.sh b/tests/keyctl/instantiating/bad-args/runtest.sh
index 0b01395..d611fb9 100644
--- a/tests/keyctl/instantiating/bad-args/runtest.sh
+++ b/tests/keyctl/instantiating/bad-args/runtest.sh
@@ -41,11 +41,11 @@
 
 # check that a non-existent key ID fails correctly
 marker "CHECK NON-EXISTENT KEY ID"
-instantiate_key --fail 0 a @p
+instantiate_key --fail $keyid a @p
 expect_error EPERM
-pinstantiate_key --fail a 0 @p
+pinstantiate_key --fail a $keyid @p
 expect_error EPERM
-negate_key --fail 0 10 @p
+negate_key --fail $keyid 10 @p
 expect_error EPERM
 
 echo "++++ FINISHED TEST: $result" >>$OUTPUTFILE