tests/test-revert.out

fix handling of files of unsupported type in the walk code

if a file was of unsupported type, it was considered as 'seen' while
walking. this way it was possible to have file in the dirstate not
yielded by the walk function.

%% should show b unknown
? b
%% should show b unknown and c modified
M c
? b
%% should show b added and c modified
M c
A b
%% should show a removed, b added and c modified
M c
A b
R a
%% should show b added and c modified
M c
A b
%% should show b unknown and c modified
M c
? b
%% should show b unknown
? b
%% should show a b and c
a
b
c