From b94dd336410f522566a7acea3305903653ff5109 Mon Sep 17 00:00:00 2001
From: AnHardt <github@kitelab.de>
Date: Wed, 18 Mar 2015 11:23:41 +0100
Subject: [PATCH] G4 could wait for an undefined time

Got:
Marlin_main.cpp:1689: warning: 'codenum' may be used uninitialized in this function

And indeed codenum is undefined when no parameter is given.
---
 Marlin/Marlin_main.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 5ad45ef2e..61d4247d8 100644
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -1690,7 +1690,7 @@ inline void gcode_G2_G3(bool clockwise) {
  * G4: Dwell S<seconds> or P<milliseconds>
  */
 inline void gcode_G4() {
-  unsigned long codenum;
+  unsigned long codenum=0;
 
   LCD_MESSAGEPGM(MSG_DWELL);