Ternary fix

in ```map::has_adjacent_furniture```:

```c
    for (int i = -1; i <= 1; i += 2)
    {
        for (int j = 0; j <= 1; j++)
        {
            // Apply the adjustment to x first, then y
            const int adj_x = 5 + !j?i:0;
            const int adj_y = 10 + j?i:0;
            printf("%4d %4d\n" ,adj_x, adj_y);
        }
    }
```

prints (checked in clang 3.0, gcc 4.7.3):
```
  -1   -1
  -1   -1
   1    1
   1    1
```

I have simplified this method, but you can just add parentheses:

```c
    for (int i = -1; i <= 1; i += 2)
    {
        for (int j = 0; j <= 1; j++)
        {
            // Apply the adjustment to x first, then y
            const int adj_x = 5 + (!j?i:0);
            const int adj_y = 10 + (j?i:0);
            printf("%4d %4d\n" ,adj_x, adj_y);
        }
    }
```

```
   4   10
   5    9
   6   10
   5   11
```