buf: tiny code improvement.

* buf.c (buf_grow): Use the previously calculated delta value,
rather than re-evaluating the equivalent expression.

1 files changed, 1 insertions, 1 deletions

diff --git a/buf.c b/buf.c
index 145de28f..6ed1e2b9 100644
--- a/buf.c
+++ b/buf.c
@@ -142,7 +142,7 @@ static void buf_grow(struct buf *b, val init_val, val self)
   while (size < len) {
     cnum delta = size / 4;
     if (INT_PTR_MAX - delta >= size)
-      size += size / 4;
+      size += delta;
     else
       size = len;
   }