updated for version 7.3.483
Problem:    More prompt shows up too often.
Solution:   Instead of adding a line break, only start a new line in the
            message history. (Christian Brabandt)
diff --git a/src/proto/message.pro b/src/proto/message.pro
index a12f120..f67b8e0 100644
--- a/src/proto/message.pro
+++ b/src/proto/message.pro
@@ -45,6 +45,7 @@
 void may_clear_sb_text __ARGS((void));
 void clear_sb_text __ARGS((void));
 void show_sb_text __ARGS((void));
+void msg_sb_eol __ARGS((void));
 int msg_use_printf __ARGS((void));
 void mch_errmsg __ARGS((char *str));
 void mch_msg __ARGS((char *str));