patch 8.1.1335: listener callback is called after inserting text

Problem:    Listener callback is called after inserting text.
Solution:   Flush the changes before inserting or deleting a line.  Store
            changes per buffer.

src/version.c

@@ -767,6 +767,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1335,
 /**/
     1334,
 /**/