patch 9.0.0961: using deletebufline() may jump to another window

Problem:    Using deletebufline() may jump to another window.
Solution:   Do not use a window where the buffer was only in the past.
            (closes #11594)
diff --git a/src/version.c b/src/version.c
index a9a0c72..ecc4da4 100644
--- a/src/version.c
+++ b/src/version.c
@@ -696,6 +696,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    961,
+/**/
     960,
 /**/
     959,