cmdline.c: fixed rubbing out words (^W) and possible chrashes

* This would sometimes rub out more than expected due to
  reading undefined memory.
  Actually even crashes were not impossible.
* This is because SCI_GETWORDCHARS does not null-terminate the buffer
  it writes but this was assumed.
  In effect, we could easily read beyond the allocated memory in wchars
  if there doesn't happen to be a null-char following the buffer.
* Consequently, null-chars in word chars were also not supported,
  although this would hardly trouble anybody.
* Instead, we now store the word chars in a teco_string_t which
  supports non-null-terminated strings natively.
  Still we null-terminate the string to keep teco_string_t's promises
  about degrading to null-terminated char *.
  This is currently not necessary.
* teco_is_wordchar() has been replaced by teco_string_contains().

0 files changed, 0 insertions, 0 deletions