Occasional issue with indexing

Every so often, the generator will fail on the second line with 

```
Traceback (most recent call last):
    File “MakeHaiku.py”, line 27, in
        print(getLine(7))
    File “MakeHaiku.py”, line 8, in getLine
        idx = random.randint(0,len(words[toGet])-1)
IndexError: list index out of range
```
