t7800 (difftool): add missing &&

diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index 2e680d7a7ac3495c9d6bd10e0fa6a6ae28bb8670..e243d9d22ea90603f0ed7754e943763055fe4bbd 100644 (file)
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -161,7 +161,7 @@ static void use(int bytes)
        input_offset += bytes;
 
        /* make sure off_t is sufficiently large not to wrap */
-       if (consumed_bytes > consumed_bytes + bytes)
+       if (signed_add_overflows(consumed_bytes, bytes))
                die("pack too large for current definition of off_t");
        consumed_bytes += bytes;
 }