I just noticed I have some errors in my error log. Could someone tell me what they mean and how to fix them please?

PHP Warning: reset() [<a href='function.reset'>function.reset</a>]: Passed variable is not an array or object in /home/fromprop/public_html/includes/classes/dynamic_price_updater.php on line 194, referer: http://frompropertorocker.com/surfs-...clip-p-23.html

PHP Warning: Variable passed to each() is not an array or object in /home/fromprop/public_html/includes/classes/dynamic_price_updater.php on line 195, referer: http://frompropertorocker.com/2-scoo...clip-p-15.html

I have these same ones for a lot of my products.

Thanks!