Expand the rectangle.
CL_Rectx<double >& CL_Rectx< double >::expand( const double & left, const double & top, const double & right, const double & bottom); CL_Rectx<double >& CL_Rectx< double >::expand( const double & left_and_right, const double & top_and_bottom); CL_Rectx<double >& CL_Rectx< double >::expand( const double & expand);