fixed retrieval of characters with codes larger than 127 - always return unsigned integer

* SCI_GETCHARAT is internally casted to `char`, which may be signed.
  Characters > 127 therefore become negative and stay so when casted to sptr_t.
  We therefore cast it back to guchar (unsigned char).
* The same is true whenever returning a string's character to SciTECO (teco_int_t)
  as our string type is `gchar *`.
* <^^x> now also works for those characters.
  Eventually, the parser will probably become UTF8-aware and this will
  have to be done differently.

0 files changed, 0 insertions, 0 deletions