Render: Broken index buffer after vid_restart

[vTurbine]

Reset logic in the render is broken by now. Even after 3964a31 I still get invalid index buffer handle when the render is destructing.

The steps to reproduce are simple:

• In the main menu open console and execute vid_restart
• Exit from the game

In case of running in debug session, an exception occurs while trying to ref counter in stats.
Since it was introduced with my recent PR #490 I'll take care of the issue. Just give me some time.
In case of an urgent fix, there is no need to revert all the changes -- just return quadIB creating logic.

[Xottab-DUTY]

This affects all renderers?

Crash only on DX10/DX11, but all renderers are affected.

[Xottab-DUTY]

Done :)

[vTurbine]

Perfect!