Add scbw::minimapPing()

```
const u32 Func_minimapPing = 0x004A34C0;
void __stdcall minimapPing(u32 x, u32 y, s32 color){
  __asm{
    PUSHAD
    PUSH color
    PUSH y
    PUSH x
    CALL Func_minimapPing
    POPAD
  }
}

Requested by racelee07 over at StarDraft Cafe
```

Original issue reported on code.google.com by `philmast...@gmail.com` on 11 Mar 2014 at 10:10
