From 0c4b5795fa46434390bd47562e45c7132a16ce6a Mon Sep 17 00:00:00 2001
From: PavelSindler <sindlerpa@gmail.com>
Date: Mon, 5 Jun 2017 10:22:02 +0200
Subject: [PATCH] G4: in case that there is no dwell time set, "Sleep..."
 message is not printed on LCD

---
 Firmware/Marlin_main.cpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/Firmware/Marlin_main.cpp b/Firmware/Marlin_main.cpp
index 90f4cbd59..1f5466b18 100644
--- a/Firmware/Marlin_main.cpp
+++ b/Firmware/Marlin_main.cpp
@@ -2300,12 +2300,11 @@ void process_commands()
         prepare_arc_move(false);
       }
       break;
-    case 4: // G4 dwell
-      LCD_MESSAGERPGM(MSG_DWELL);
+    case 4: // G4 dwell      
       codenum = 0;
       if(code_seen('P')) codenum = code_value(); // milliseconds to wait
       if(code_seen('S')) codenum = code_value() * 1000; // seconds to wait
-
+	  if(codenum != 0) LCD_MESSAGERPGM(MSG_DWELL);
       st_synchronize();
       codenum += millis();  // keep track of when we started waiting
       previous_millis_cmd = millis();