tic confused about ich/ich1

[Sebastian J. Bronner]

Hi Thomas,

I have been using `tic -v` to help clean up the upstream `st` terminfo
entry.  While doing that I stumbled across a warning that seemed a
little -- off:

```
"st.info", line 1, terminal 'st': non-curses applications may be confused by 
ich1 with smir/rmir
```

st.info has no `ich1` capability. But it does have the `ich` capability,
which is what `tic` is actually checking. See

ncurses-6.1-20191102/progs/tic.c:3051-3059

Both the comments there and the warning string mention `ich1`. The condition
is checking for the presence of `ich`, though. Which is correct?

Cheers,
Sebastian