Fix compiling with egl on Linux (thx @entity for reporting)


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code@4858 dfc29bdd-3216-0410-991c-e03cc46cb475
Fix crash on releasing device (error was introduced when merging from trunk).


git-svn-id: svn://svn.code.sf.net/p/irrlicht/code@4859 dfc29bdd-3216-0410-991c-e03cc46cb475
- Moved vertex descriptor from vertex buffer to mesh buffer. (This commit may break some examples and DX11).

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code@4860 dfc29bdd-3216-0410-991c-e03cc46cb475