Image#setMultiSample incorrectly throws exceptions

[codex128]

jmonkeyengine/jme3-core/src/main/java/com/jme3/texture/Image.java

Lines 939 to 955 in ec7f6e1

	/**
	* @param multiSamples Set the number of samples to use for this image,
	* setting this to a value higher than 1 turns this image/texture
	* into a multisample texture (on OpenGL3.1 and higher).
	*/
	public void setMultiSamples(int multiSamples) {
	if (multiSamples <= 0)
	throw new IllegalArgumentException("multiSamples must be > 0");
	if (getData(0) != null)
	throw new IllegalArgumentException("Cannot upload data as multisample texture");
	if (hasMipmaps())
	throw new IllegalArgumentException("Multisample textures do not support mipmaps");
	this.multiSamples = multiSamples;
	}

If the argument is 1, that is supposed to make the image not multisampled according to the documentation, but exceptions can still be thrown as if the image was multisampled.