Minor bug...

Hi, just went thru a minor bug in
[b]panda/src/pgraph/lightRampAttrib.cxx/b:

subscript out of range in :

      out << "double_threshold(" << _level[0] << "," << _level[1] << "," << _level[2] << "," << _threshold[0] << "," << _threshold[0] << ")";

BUT _level has been declared as float _level[2];

Thanks, I checked in a fix.