It is a "false positive", and you don't need to worry about it.
Just tell the virus checker to ignore that file in the future,a nd you will be okay.
The virus checker is actually doing its job, when it told you about this, as the coding looks suspiciously like a virus to the checker. The checker just can't tell if it is there for good reason, or there for malicious reasons - so it brings it to your attention.
And, you are very smart in checking on it, and not just ignoring it.
(DISCLAIMER: I am NOT an employee of LMI, nor do I have any financial concern in LMI. I am strictly a HAPPY USER of LMI products. I am using PC version and XP SP2. Other systems or versions may act different than described above.)