[PATCH] Fix PR c++/19989 4.0/4.1 regression

[Josh Conner]

Sorry - I forgot to include the change logs in my previous email:

2005-11-02  Josh Conner  <jconner@xxxxxxxxx>

        PR c++/19989
        pt.c (tsubst): Accept zero-length array if tf_error is set
        in complain flags.  Change error message for negative-
        length array.

2005-11-02  Josh Conner  <jconner@xxxxxxxxx>

        PR c++/19989
        g++.dg/ext/array2.C: New test.
        g++.dg/template/dependent-name3.C: New test.
        g++.dg/template/dependent-name4.C: New test.