Fix set_lcd_contrast

Marlin/ultralcd.cpp

 
 #if HAS_LCD_CONTRAST
 
-  void set_lcd_contrast(const int value) {
+  void set_lcd_contrast(const uint16_t value) {
     lcd_contrast = constrain(value, LCD_CONTRAST_MIN, LCD_CONTRAST_MAX);
     u8g.setContrast(lcd_contrast);
   }