update : add missing doc.

Signed-off-by: Kim Kulling <kim.kulling@googlemail.com>
update : make the object name const.

Signed-off-by: Kim Kulling <kim.kulling@googlemail.com>
- bugfix : fix invalid size of vertex buffer creation.
- bugfix : fix types of temporary setting-methods for matrices for d3d9-rendering.

Signed-off-by: Kim Kulling <kim.kulling@googlemail.com>