intrusive/deriviation_value_traits.hpp missing include

[Antony Polukhin]

In boost_1_49_0_beta1 header boost/pointer_to_other.hpp must be included in boost/intrusive/deriviation_value_traits.hpp.

Otherwise, this errors are produced:

./boost/intrusive/derivation_value_traits.hpp:35:28: error: 'pointer_to_other' in namespace 'boost' does not name a type

./boost/intrusive/derivation_value_traits.hpp:35:44: error: expected unqualified-id before '<' token

./boost/intrusive/derivation_value_traits.hpp:36:28: error: 'pointer_to_other' in namespace 'boost' does not name a type

./boost/intrusive/derivation_value_traits.hpp:36:44: error: expected unqualified-id before '<' token

./boost/intrusive/derivation_value_traits.hpp:38:22: error: 'pointer' was not declared in this scope

./boost/intrusive/derivation_value_traits.hpp:38:29: error: template argument 1 is invalid

./boost/intrusive/derivation_value_traits.hpp:40:22: error: 'const_pointer' was not declared in this scope

./boost/intrusive/derivation_value_traits.hpp:40:35: error: template argument 1 is invalid

[Ion Gaztañaga]

Fixed in trunk and release branches (At revision: 76826)