Small optimization in _scan_at.

If the input is null, we can just return 0.

1 files changed, 1 insertions, 2 deletions

diff --git a/src/scanners.re b/src/scanners.re
index 00a0b12..befe7d0 100644
--- a/src/scanners.re
+++ b/src/scanners.re
@@ -6,10 +6,9 @@ bufsize_t _scan_at(bufsize_t (*scanner)(const unsigned char *), cmark_chunk *c,
 {
 	bufsize_t res;
 	unsigned char *ptr = (unsigned char *)c->data;
-        unsigned char zero = '\0';
 
         if (ptr == NULL) {
-          res = scanner(&zero);
+          return 0;
         } else {
 	  unsigned char lim = ptr[c->len];