Makes kadmin not to ask password if user already has valid tickets.

There was a patch merged in heimdal-0.8, but currently proper 
behavior is broken again. This patch is ugly hack, that blindly
mimics the old 0.7.2 behavior without understanding what is actually happening

Author: Hai Zaar

--- heimdal-1.0.1/lib/kadm5/init_c.c.orig	2007-11-27 16:02:15.000000000 +0200
+++ heimdal-1.0.1/lib/kadm5/init_c.c	2007-11-27 16:04:39.000000000 +0200
@@ -286,9 +286,6 @@
 	    krb5_free_creds(context, out);
 	}
     }
-    krb5_cc_close(context, *id);
-    *id = NULL;
-
     name = krb5_principal_get_comp_string(context, p1, 0);
     inst = krb5_principal_get_comp_string(context, p1, 1);
     if(inst == NULL || strcmp(inst, "admin") != 0) {
@@ -361,6 +358,11 @@
 	}
     }
 
+	if(client && default_client) {
+		krb5_free_principal(context, default_client);
+		default_client = NULL;
+	}    
+
 
     /*
      * No client was specified by the caller, but we have a client