kylelutz/compute — pull request #13 by ddemidov (2013-06-21 11:30:13+00:00)
Title: Get rid of clang-3.3 -Wconstexpr-not-const warning

Without the patch, clang-3.3 shows the following warning:

```
.../compute/include/boost/compute/container/vector.hpp:454:31: warning: 'constexpr' non-static member function will not be
implicitly 'const' in C++1y; add 'const' to avoid a change in behavior [-Wconstexpr-not-const]
BOOST_CONSTEXPR size_type _minimum_capacity() { return 4; }
^
const
.../compute/include/boost/compute/container/vector.hpp:455:27: warning: 'constexpr' non-static member function will not be
implicitly 'const' in C++1y; add 'const' to avoid a change in behavior [-Wconstexpr-not-const]
BOOST_CONSTEXPR float _growth_factor() { return 1.5; }
^
const

```