class.hpp, object/select_holder.hpp, object/pointer_holder.hpp -
fix a problem which was causing value_holder<T> to be instantiated
on abstract classes. Now we compute the held_type at an outer
level thereby avoiding the inner instantiation.
object_core.hpp -
workarounds for GCC 2.x bugs
suite/indexing/detail/indexing_suite_detail.hpp -
workaround for a CWPro8 bug