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)

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    961,
 /**/
     960,
 /**/