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Basically, assume left is correct, and calculate the correct width
to fill the screen to the esge.

- Backtab also exits with K_TABEXIT when the string is selected
- Backspace scrolls the text to the left of the cursor to the right
  if the left of the input is not the start of the string.

Just rename ESCDELAY member to escdelay.

To make Coverity and my adult-self happy.

After calculating i (offset in list to top of window), if it's less
than zero, apply it to bar and set i = 0.

Fixes #218

Now the default bar is INT_MAX, so it always gets corrected when
left as default.

This is good.

Instead of setting bar to zero when possible, set it to the number
of displayed options, putting the lightbar at the bottom of the
displayed list instead of at the top.

So here's what we're doing now... we set bar so that the first item
shown in the menu is the lowest index possible that still shows cur.
bar is therefore calculated as the displayed item count minus the
distance from cur to the end of the list.

Yeah, that's the easiest way to explain it.

umonitor uses these mode flags together (or soon will) and bad things happen
if you always clear the buffers that you're trying to save/restore.

There are a number of conio changes in here too... too many to list.  Check
the diffs if you actually want to know what changed.

getcliptext() and copytext() (ie: copy/paste) now work on UTF-8 strings.
Not tested on Win32 yet.

tree to commit both at once.

There was a crash when wrapping at the end of a search.  Now there isn't.
You're welcome.

the find-text string.

length of option[].

terminated with a 0-length option string).
There still another crash I'm investigating that occurs if you type a string
that isn't found. It appears to deref past the end of the option array.

Requested by: DigitalMan.

- msg() now returns an int (e.g. 0 for OK, non-zero otherwise)
- add msgf() a printf-style version of msg()
- add confirm() a printf-stle yes/no dialog (returns TRUE on "Yes"/default)
- add deny() a printf-style no/yes dialog (returns TRUE on "No"/default)
- add yesNoOpts to allow application to over-ride "Yes"/"No" strings.

passed.

characters as the buffer width terminated by a linefeed would cause an
extra blank line to be inserted due to incorrect end-of-line detection.

The number of lines to allocate was calculated correctly, so this resulted
in writing past the last line in the screen buffer, corrupting memory after
the allocation.  Glibc detected this condition and crashed with a double-
free or corruption message.