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

Marlin/ultralcd.pde

@@ -366,11 +366,11 @@ void MainMenu::showStatus()
   {
     encoderpos=feedmultiply;
     clear();
-    lcd.setCursor(0,0);lcdprintPGM("\002---/---\001 ");
+    lcd.setCursor(0,0);lcdprintPGM("\002000/000\001 ");
     #if defined BED_USES_THERMISTOR || defined BED_USES_AD595 
-      lcd.setCursor(10,0);lcdprintPGM("B---/---\001 ");
+      lcd.setCursor(10,0);lcdprintPGM("B000/000\001 ");
     #elif EXTRUDERS > 1
-      lcd.setCursor(10,0);lcdprintPGM("\002---/---\001 ");
+      lcd.setCursor(10,0);lcdprintPGM("\002000/000\001 ");
     #endif
   }