patch 8.0.0854: no redraw after terminal was closed

Problem:    No redraw after terminal was closed.
Solution:   Set typebuf_was_filled. (Yasuhiro Matsumoto, closes #1925, closes
            #1924)  Add function to check for messages even when input is
            available.
diff --git a/src/version.c b/src/version.c
index 6170425..25750b5 100644
--- a/src/version.c
+++ b/src/version.c
@@ -770,6 +770,8 @@
 static int included_patches[] =
 {   /* Add new patch number below this line */
 /**/
+    854,
+/**/
     853,
 /**/
     852,