Fixing conficts due to recent changes involving "Farm Mode".

Firmware/ultralcd.cpp

@@ -97,8 +97,8 @@ int8_t SilentModeMenu = 0;
 int lcd_commands_type=LCD_COMMAND_IDLE;
 int lcd_commands_step=0;
 bool isPrintPaused = false;
-int oldFanSpeed = 0;
-bool farm_mode = false;
+uint8_t oldFanSpeed = 0;
+uint8_t farm_mode = 0;
 int farm_no = 0;
 int farm_timer = 30;
 int farm_status = 0;