[patch v3] Fix cyrillic symbols show in tui.

[Tom Tromey]

>>>>> ">" == Vaag via Gdb-patches <gdb-patches@sourceware.org> writes:

>> From: Vahagn Vardanyan <vaag@ispras.ru>
>> Cyrillic symbols are truncated when assigned to signed char
>> and are shown as special symbols in tui.
>> The patch uses unsigned char to allow 256 bit encoding.

>> gdb/ChangeLog

>>         * tui/tui-winsource.c (tui_copy_source_line):
>>         Change type from char to unsigned char.
>>         * tui/tui-io.c (do_tui_putc):
>>         Use waddstr instead of waddch.

Could you try this instead?

https://sourceware.org/pipermail/gdb-patches/2020-April/167397.html

It's slightly buggy and needs another tweak but, I think, is more
complete than the approach you took.  In particular it ought to work if
a multi-byte character extends past the window boundary.

If that works for you in a preliminary way, I'll clean it up.

Tom