GL_NV_primitive_restart
http://www.opengl.org/registry/specs/NV/primitive_restart.txt
	GL_PRIMITIVE_RESTART_NV 0x8558
	GL_PRIMITIVE_RESTART_INDEX_NV 0x8559
	void glPrimitiveRestartIndexNV (GLuint index)
	void glPrimitiveRestartNV (void)
