Hi Adrien,
Thanks for the report of the warning message on the "bank transfert" plugin for HikaShop 2.0.0
The fact is that we rewrite all payment and shipping plugins in HikaShop 2.2.0 and fix made a big pass on the PHP5.4 warnings.
If you update HikaShop with the latest build, you would no longer have this message.
But if you don't want to upgrade HikaShop, just send a message to your webmaster and he will modify the files directly in order to remove these warnings.
After that, I fixed the spelling mistake. Thanks for the report too.
For our new website, thanks again. If you like news websites, you can take a lot at the new Acymailing demo website !
Awesome too, a little bit less than this one ; but you know...
Regards,