public void majPlateau(Positions pos, Positions newPos)
	{
		if (!(newPos == null))
		{
			this.plateau[pos.getLigne()][pos.getColonne()] = EtatDesCases.LIBRE;
			this.plateau[newPos.getLigne()][newPos.getColonne()] = EtatDesCases.OCCUPEE;
			return;
		}
		if (this.plateau[pos.getLigne()][pos.getColonne()] == EtatDesCases.OCCUPEE)
			return;
		this.plateau[pos.getLigne()][pos.getColonne()] = EtatDesCases.OCCUPEE;
	}