shadows broken

[joevenzon]

Disclaimer: I haven't looked at it at all. However, my guess is that my dynamic reflection check in broke shadows because I moved cars out of one of the filter groups (so the cars don't reflect themselves) and forgot to add the new filter group to the shadow draw calls. I'm rewriting a lot of graphics.cpp anyway and removing filters in the new scenegraph system so don't worry about it too much. :-)