patch 7.4.1876
Problem:    Typing "k" at the hit-enter prompt has no effect.
Solution:   Don't assume recursive use of the prompt if a character was typed.
            (Hirohito Higashi)
diff --git a/src/message.c b/src/message.c
index d3572eb..5bd6027 100644
--- a/src/message.c
+++ b/src/message.c
@@ -2475,9 +2475,9 @@
     int		i;
 
     /* We get called recursively when a timer callback outputs a message. In
-     * that case don't show another prompt. Also when at the hit-Enter prompt.
-     */
-    if (entered || State == HITRETURN)
+     * that case don't show another prompt. Also when at the hit-Enter prompt
+     * and nothing was typed. */
+    if (entered || (State == HITRETURN && typed_char == 0))
 	return FALSE;
     entered = TRUE;