add more ()

```
getopt.c:177:70: error: '&&' within '||' [-Werror,-Wlogical-op-parentheses]
                        (optstring[0] == '-' || optstring[0] == '+') &&
```
Add more ( )
```
                    if(optstring[0] == ':' ||
                        ((optstring[0] == '-' || optstring[0] == '+') && optstring[1] == ':'))
                    {
```