Try to not leak memory.

git-svn-id: svn://svn.h5l.se/heimdal/trunk/heimdal@18828 ec53bebd-3082-4978-b11e-865c3cabbd6b

kuser/kdestroy.c

@@ -122,6 +122,7 @@ main (int argc, char **argv)
 		krb5_err(context, 1, ret, 
 			 "Failed to remove principal %s", credential);
 
+	    krb5_free_principal(context, mcred.server);
 	    krb5_free_context(context);
 	    return 0;
 	}