Fix check for include LiquidCrystalRus.h

Marlin/ultralcd.h

 #define ULTRALCD_H
 #include "Marlin.h"
 #ifdef ULTRA_LCD
+#include "language.h"
 #if LANGUAGE_CHOICE == 6
 #include "LiquidCrystalRus.h"
 #else

Marlin/ultralcd.pde

 LiquidCrystalRus lcd(LCD_PINS_RS, LCD_PINS_ENABLE, LCD_PINS_D4, LCD_PINS_D5,LCD_PINS_D6,LCD_PINS_D7);  //RS,Enable,D4,D5,D6,D7
 #else
 LiquidCrystal lcd(LCD_PINS_RS, LCD_PINS_ENABLE, LCD_PINS_D4, LCD_PINS_D5,LCD_PINS_D6,LCD_PINS_D7);  //RS,Enable,D4,D5,D6,D7 
-#elseif
+#endif
 
 static unsigned long previous_millis_lcd=0;
 //static long previous_millis_buttons=0;