Update special.php

added line 85 to fix special.tpl when giving error:

The requested URL /cart/Notice: Undefined variable: continue in /var/www/OpenCart/catalog/view/theme/default/template/product/special.tpl on line 105 was not found on this server.
https://github.com/opencart/opencart/issues/2056
Merge branch 'master' of https://github.com/opencart/opencart
Merge pull request #2219 from manakill/patch-1

Update special.php
- adding check that transactionreference is set, was supposed to be a required field but was not always set in the secure trading IPN
- changing confirm function name to addOrderHistory
Merge branch 'master' of https://github.com/opencart/opencart into confirm_bug_branch
https://github.com/opencart/opencart/issues/2214
event system update
Merge pull request #2228 from chris-wm/confirm_bug_branch

Confirm bug branch