conditional markdown preprocessing

diff --git a/name-hash.c b/name-hash.c
index b4861bc7b02a93bd5f3659098764f535bb1f51c1..695908609f40f9cbb3960162a311af5d452610e2 100644 (file)
--- a/name-hash.c
+++ b/name-hash.c
@@ -345,8 +345,9 @@ static int handle_range_dir(
        else {
                int begin = k_start;
                int end = k_end;
+               assert(begin >= 0);
                while (begin < end) {
-                       int mid = (begin + end) >> 1;
+                       int mid = begin + ((end - begin) >> 1);
                        int cmp = strncmp(istate->cache[mid]->name, prefix->buf, prefix->len);
                        if (cmp == 0) /* mid has same prefix; look in second part */
                                begin = mid + 1;