Update pins.h

defined LCD_CONTRAST -1 for each MB as a default

MarlinKimbra/pins.h

@@ -946,6 +946,7 @@
   
       #ifdef REPRAP_DISCOUNT_SMART_CONTROLLER
         #define BEEPER        37
+        #define LCD_CONTRAST  -1
 
         #define BTN_EN1       31
         #define BTN_EN2       33
@@ -1145,6 +1146,7 @@
   
       #ifdef REPRAP_DISCOUNT_SMART_CONTROLLER
         #define BEEPER        37
+        #define LCD_CONTRAST  -1
 
         #define BTN_EN1       31
         #define BTN_EN2       33
@@ -1344,6 +1346,7 @@
   
       #ifdef REPRAP_DISCOUNT_SMART_CONTROLLER
         #define BEEPER        37
+        #define LCD_CONTRAST  -1
 
         #define BTN_EN1       31
         #define BTN_EN2       33
@@ -1543,6 +1546,7 @@
   
       #ifdef REPRAP_DISCOUNT_SMART_CONTROLLER
         #define BEEPER        37
+        #define LCD_CONTRAST  -1
 
         #define BTN_EN1       31
         #define BTN_EN2       33
@@ -2026,6 +2030,8 @@
    #ifdef NEWPANEL
      //we have no buzzer installed
      #define BEEPER -1
+	 //we can't regulate contrast by default
+	 #define LCD_CONTRAST -1
      //LCD Pins
      #ifdef DOGLCD
 	   #ifdef U8GLIB_ST7920 //SPI GLCD 12864 ST7920 ( like [www.digole.com] ) For Melzi V2.0
@@ -2205,6 +2211,7 @@
 
     #ifdef REPRAP_DISCOUNT_SMART_CONTROLLER
       #define BEEPER 37
+	  #define LCD_CONTRAST -1
 	  
       #define BTN_EN1 31
       #define BTN_EN2 33
@@ -2409,6 +2416,7 @@
 
     #ifdef REPRAP_DISCOUNT_SMART_CONTROLLER
       #define BEEPER 37
+      #define LCD_CONTRAST  -1
 
       #define BTN_EN1 31
       #define BTN_EN2 33
@@ -4514,3 +4522,4 @@ DaveX plan for Teensylu/printrboard-type pinouts (ref teensylu & sprinter) for a
 #define HAS_DIGIPOTSS (DIGIPOTSS_PIN >= 0)
 
 #endif //__PINS_H
+