Fix compiler warnings

- Patched up for most included configurations

Marlin/pins_3DRAG.h

@@ -4,18 +4,25 @@
 
 #include "pins_RAMPS_13.h"
 
+#undef Z_ENABLE_PIN
 #define Z_ENABLE_PIN       63
 
+#undef X_MAX_PIN
+#undef Y_MAX_PIN
+#undef Z_MAX_PIN
 #define X_MAX_PIN          2
 #define Y_MAX_PIN          15
 #define Z_MAX_PIN          -1
 
+#undef SDSS
 #define SDSS               25//53
 
-#define BEEPER             33
-
+#undef FAN_PIN
 #define FAN_PIN            8
 
+#undef HEATER_1_PIN
+#undef HEATER_2_PIN
+#undef HEATER_BED_PIN
 #define HEATER_0_PIN       10
 #define HEATER_1_PIN       12
 #define HEATER_2_PIN       6
@@ -23,8 +30,15 @@
 #define HEATER_BED_PIN     9    // BED
 
 #if defined(ULTRA_LCD) && defined(NEWPANEL)
+  #undef BEEPER
   #define BEEPER -1
 
+  #undef LCD_PINS_RS
+  #undef LCD_PINS_ENABLE
+  #undef LCD_PINS_D4
+  #undef LCD_PINS_D5
+  #undef LCD_PINS_D6
+  #undef LCD_PINS_D7
   #define LCD_PINS_RS 27
   #define LCD_PINS_ENABLE 29
   #define LCD_PINS_D4 37
@@ -33,7 +47,15 @@
   #define LCD_PINS_D7 31
 
   // Buttons
+  #undef BTN_EN1
+  #undef BTN_EN2
+  #undef BTN_ENC
   #define BTN_EN1 16
   #define BTN_EN2 17
   #define BTN_ENC 23 //the click
+
+#else
+
+  #define BEEPER 33
+
 #endif // ULTRA_LCD && NEWPANEL