Use ssize_t to avoid underflow

1 files changed, 1 insertions, 1 deletions

diff --git a/main.l b/main.l
index cae65e7..144fef3 100644
--- a/main.l
+++ b/main.l
@@ -160,7 +160,7 @@ print_ordinal(void)
 		return true;
 
 	/* Basic binary search */
-	for (size_t l = 0, r = positions.len - 1, m; l <= r;) {
+	for (ssize_t l = 0, r = positions.len - 1, m; l <= r;) {
 		m = l + (r - l) / 2;
 		if (positions.ps[m] == pos)
 			return true;