cleanup: fix possible overflow errors in binary search

diff --git a/sha1_name.c b/sha1_name.c
index 134ac9742f9eed3dc6e587875bdb9aa77b7a8307..c7c5ab376ccb56b3a4f4533f61293bd543ea8097 100644 (file)
--- a/sha1_name.c
+++ b/sha1_name.c
@@ -157,7 +157,7 @@ static void unique_in_pack(struct packed_git *p,
        num = p->num_objects;
        last = num;
        while (first < last) {
-               uint32_t mid = (first + last) / 2;
+               uint32_t mid = first + (last - first) / 2;
                const unsigned char *current;
                int cmp;