fix LCD temp bed artifacts on power up ' B022/0.) -> B022/000 '

Marlin/ultralcd.pde

   lcd.createChar(3,uplevel);
   lcd.createChar(4,refresh);
   lcd.createChar(5,folder);
+  setTargetHotend0(0);setTargetHotend1(0);setTargetHotend2(0);setTargetBed(0);
   LCD_MESSAGEPGM(WELCOME_MSG);
 }