patch 8.2.3763: when editing the cmdline a callback may cause a scroll up

Problem:    When editing the command line a FocusLost callback may cause the
            screen to scroll up.
Solution:   Do not redraw at the last line but at the same place where the
            command line was before. (closes #9295)
diff --git a/src/proto/drawscreen.pro b/src/proto/drawscreen.pro
index 528c8b2..c835019 100644
--- a/src/proto/drawscreen.pro
+++ b/src/proto/drawscreen.pro
@@ -8,7 +8,7 @@
 void update_debug_sign(buf_T *buf, linenr_T lnum);
 void updateWindow(win_T *wp);
 int redraw_asap(int type);
-void redraw_after_callback(int call_update_screen);
+void redraw_after_callback(int call_update_screen, int do_message);
 void redraw_later(int type);
 void redraw_win_later(win_T *wp, int type);
 void redraw_later_clear(void);