fix failed count in ConsoleReporter when there are skipped_or_pending_specs

The `failures` output in ConsoleReporter is incorrect if `skipped_or_pending_specs` is greater than 0.

Running:
```
rake spec:javascripts SPEC=myspec
```

Before:
````
4 specs, 2081 skipped or pending, -2081 failures in 0.43s.
````

After:
````
4 specs, 2081 skipped or pending, 0 failures in 0.43s.
````

Verified that it works if you run the whole test suite and if there is a failure.