Change topic forum when move a file

When you move a file to another category, IP.Downloads doesn't change the forum of topic created.

To change that, open sources/components_public/downloads/moderate.php and find:

				$this->ipsclass->DB->do_update( "downloads_files", array( 'file_cat' => $newcatid ), "file_id=".$id );

Add above:

				$newcat = $this->catlib->cat_lookup[ $newcatid ];
				 if ( $newcat['coptions']['opt_topice'] == 1 )
				 {
					 $this->ipsclass->DB->do_update( "topics", array( 'forum_id' => $newcat['coptions']['opt_topicf'] ), "tid=".$file['file_topicid'] );
				 }

It's done... now, if you move a file and new category allows to create a new topic, the topic created will be moved to.