From 396434a44530109190be95b6e17f5b7ce1976fcc Mon Sep 17 00:00:00 2001
From: Scott Lahteine <sourcetree@thinkyhead.com>
Date: Thu, 27 Oct 2016 05:53:44 -0500
Subject: [PATCH] Fix compiler warning in M145

---
 Marlin/Marlin_main.cpp | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Marlin/Marlin_main.cpp b/Marlin/Marlin_main.cpp
index 673a46dae1..f3588fd289 100755
--- a/Marlin/Marlin_main.cpp
+++ b/Marlin/Marlin_main.cpp
@@ -5518,8 +5518,8 @@ inline void gcode_M140() {
    *   F<fan speed>
    */
   inline void gcode_M145() {
-    int8_t material = code_seen('S') ? (int8_t)code_value_int() : 0;
-    if (material < 0 || material >= COUNT(lcd_preheat_hotend_temp)) {
+    uint8_t material = code_seen('S') ? (uint8_t)code_value_int() : 0;
+    if (material >= COUNT(lcd_preheat_hotend_temp)) {
       SERIAL_ERROR_START;
       SERIAL_ERRORLNPGM(MSG_ERR_MATERIAL_INDEX);
     }