updated for version 7.3.1288
Problem:    The first ":echo 'hello'" command output doesn't show.  Mapping
            for <S-F3> gets triggered during startup.
Solution:   Add debugging code for the termresponse.  When receiving the "Co"
            entry and when setting 'ambiwidth' redraw right away if possible.
            Add redraw_asap().  Don't set 'ambiwidth' if it already had the
            right value.  Do the 'ambiwidth' check in the second row to avoid
            confusion with <S-F3>.
diff --git a/src/proto/screen.pro b/src/proto/screen.pro
index 81fa6a7..31f97d5 100644
--- a/src/proto/screen.pro
+++ b/src/proto/screen.pro
@@ -5,6 +5,7 @@
 void redraw_all_later __ARGS((int type));
 void redraw_curbuf_later __ARGS((int type));
 void redraw_buf_later __ARGS((buf_T *buf, int type));
+int redraw_asap __ARGS((int type));
 void redrawWinline __ARGS((linenr_T lnum, int invalid));
 void update_curbuf __ARGS((int type));
 void update_screen __ARGS((int type));