patch 9.1.1129: missing out-of-memory test in buf_write()

Problem:  missing out-of-memory test in buf_write()
Solution: Check that the returned allocated buffer is not NULL
          (John Marriott)

closes: #16678

Signed-off-by: John Marriott <basilisk@internode.on.net>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/version.c b/src/version.c
index fc31646..6469053 100644
--- a/src/version.c
+++ b/src/version.c
@@ -705,6 +705,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    1129,
+/**/
     1128,
 /**/
     1127,