Invalid squeezing for files without semicolon

This code (extracted from CodeMirror) is broken after applying jsqueeze on it:

```js
    out.push(text)
    ++n
```

It is minified as

```js
n.push(o)++r
```

while it must be

```js
n.push(o);++r
```

you cannot remove the newline before an increment/decrement operator without inserting the semicolon explicitly.