Fixed build error due missing includes related to enum 'uninitialized'

`uninitialized` enum was referenced in 'ulp.inl' and 'func_vector_relational.inl' but the header where it is declared, 'type_vec.hpp' was not included in either.
Solution: include 'type_vec.hpp' in 'ulp.hpp' and 'func_vector_relational.hpp'