Joomla module conflict causes Fatal Error with JSON classes when importing data

When other Joomla modules are installed which use their own JSON Services class (eg. K2, JomComment, Community, MyBlog, Azrul Video Mambot, Azrul System Mambot), there is a fatal error when attempting to import data; 'Fatal error: Cannot redeclare class Services_JSON'.

In the forum at; http://forum.civicrm.org/index.php/topic,5886.msg44104.html the suggestion was to turn off conflicting modules when importing data. This may not be feasible in a number of instances, and a fix is raised at; http://forum.civicrm.org/index.php/topic,5886.msg44104.html#msg44104

This fix has been successfully tested in versions 2.2.9 and 3.0

Attached is a copy of JSON.php with corrections which can be used to replace the current JSON.php

This issue has not been addressed in v3.0.1 and this patch should provide a fix there too.