patch 8.1.2075: get many log messages when waiting for a typed character

Problem:    Get many log messages when waiting for a typed character.
Solution:   Do not repeat the repeated messages when nothing happens.
diff --git a/src/globals.h b/src/globals.h
index 18f7611..1dcda8f 100644
--- a/src/globals.h
+++ b/src/globals.h
@@ -1728,3 +1728,9 @@
 EXTERN int ctrl_break_was_pressed INIT(= FALSE);
 EXTERN HINSTANCE g_hinst INIT(= NULL);
 #endif
+
+#if defined(FEAT_JOB_CHANNEL)
+EXTERN int did_repeated_msg INIT(= 0);
+# define REPEATED_MSG_LOOKING	    1
+# define REPEATED_MSG_SAFESTATE	    2
+#endif