Update MenuScreens.cpp

![kor](https://f.cloud.github.com/assets/4208406/410164/e1a7df78-ab66-11e2-85d3-b1c98082c787.png)
before

![kor2](https://f.cloud.github.com/assets/4208406/410168/fe8b4832-ab66-11e2-902d-a33a0f4f30b2.png)
after

Fix missing character when compiles on non-western system