From 6cc6029d7af47a2a6103742d8af1264af8631226 Mon Sep 17 00:00:00 2001
From: haxar <haxaraxah@gmail.com>
Date: Sun, 22 Jan 2012 03:25:56 -0800
Subject: [PATCH] M109 EOL fix when TEMP_RESIDENCY_TIME is undefined; printer
 interface (pronterface) could not see target extruder heater temperature to
 continue print

---
 Marlin/Marlin.pde | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Marlin/Marlin.pde b/Marlin/Marlin.pde
index 824a57d780..bbef8170d7 100644
--- a/Marlin/Marlin.pde
+++ b/Marlin/Marlin.pde
@@ -864,6 +864,8 @@ FORCE_INLINE void process_commands()
               {
                  SERIAL_PROTOCOLLN( "?" );
               }
+            #else
+              SERIAL_PROTOCOLLN("");
             #endif
             codenum = millis();
           }