Bugfix: Fixes incorrect hook_theme usage in answers module which results in PHP notices

## Ready State: Yes

Fixes an issue discovered on linux.com redesign: https://imagex.atlassian.net/browse/LDC-378

The answers.module incorrectly uses 'original hook' in hook_theme which is a Drupal 6 options which results in Drupal not being able to find 'render elements' or 'variables' from the "parent" node hook.

NOTE: I was unable to search the answers module issue queue as it constantly timed out but was unable to find anything similar via Google.

## Requirements & Dependencies

None

## Deployment Instructions

* Merge code.

## Usage/Test Instructions

Ensure patch applies cleanly.