use documented default key ttl

bin/python/isc/dnskey.py.in

@@ -452,6 +452,10 @@ class dnskey:
         if timespan is None:
             timespan = self.ttl
 
+        if timespan is None:
+            output("WARNING: Key %s using default TTL." % repr(self))
+            timespan = (60*60*24)
+
         now = time.time()
         d = self.delete()
         i = self.inactive()

bin/tests/system/coverage/12-ksk-deletion/expect

@@ -1,6 +1,6 @@
 args=
-warn=1
-error=0
-ok=0
-retcode=0
+warn=4
+error=1
+ok=1
+retcode=1
 match=0