rl_refresh_line(): new (undocumented) readline compat fn

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/editline.c

@@ -534,6 +534,12 @@ static el_status_t redisplay(void)
     return CSmove;
 }
 
+int rl_refresh_line(int ignore1 __attribute__((unused)), int ignore2 __attribute__((unused)))
+{
+    redisplay();
+    return 0;
+}
+
 static el_status_t toggle_meta_mode(void)
 {
     rl_meta_chars = ! rl_meta_chars;