add `self.segmentWidthStyle` in `if`

Maybe line 535 
```
    } else if (self.type == HMSegmentedControlTypeTextImages && HMSegmentedControlSegmentWidthStyleFixed){
```

should be
```
    } else if (self.type == HMSegmentedControlTypeTextImages && self.segmentWidthStyle == HMSegmentedControlSegmentWidthStyleFixed){
```

--------

PS:
Got a warning while using this lib in Swift.
Warning: "Code will never be executed"