Fix buffer overflow

Co-authored-by: Ezequiel Bellver <ebellver@itba.edu.ar>
Co-authored-by: Juan Barmasch <jbarmasch@itba.edu.ar>

src/parser.c

@@ -62,7 +62,7 @@ struct parser_event * parser_feed(struct parser *p, const uint8_t c) {
     return &p->e1;
 }
 
-static const unsigned classes[0xFF] = {0x00};
+static const unsigned classes[0xFF + 1] = {0x00};
 
 const unsigned * parser_no_classes(void) {
     return classes;