buffer test: fix memory leak in test code

Forgot to delete a buffer in the test driver. There was no memory leak
or memory error in any installed code.

1 files changed, 0 insertions, 2 deletions

diff --git a/TODO b/TODO
index 2436cb1a..d006c9e2 100644
--- a/TODO
+++ b/TODO
@@ -1,8 +1,6 @@
 Soon
 ====
 
- * libtests buffer test fails with address sanitizer.
-
  * Figure out how to render Gajić correctly in the PDF version of the
    qpdf manual.