lex: fix lex_advance() and replace l->pos additions

l->pos increments are replaced with lex_advance, which now accepts
offsets. lex_advance() now returns 0 and does not increment past
buffer size upon out-of-bounds.

1 files changed, 1 insertions, 1 deletions

diff --git a/include/lex.h b/include/lex.h
index 4b8b1ac..634be5f 100644
--- a/include/lex.h
+++ b/include/lex.h
@@ -48,7 +48,7 @@ struct lex {
 	size_t line;
 };
 
-char lex_advance(struct lex *l);
+char lex_advance(struct lex *l, size_t o);
 char lex_seek(struct lex *l, size_t o);
 
 struct token lex_number(struct lex *l);