Having a pack file name without suffix prevents graphic to show

[Google Code Exporter]

What steps will reproduce the problem?
1. open/create a project
2. change the "File name:" to "all"
3. click on "Pack selected"

What is the expected output? What do you see instead?

I expect to see the packed graphics on the right of the screen. Instead I see 
nothing.

What version of the product are you using? On what operating system?

3.2.0; Linux

Please provide any additional information below.

If set the filename to "all.atlas" the graphic is displayed.

The suffix ".atlas" is added automatically if it does not exist upon image 
creation. From com.badlogic.gdx.tools.imagepacker.TexturePackerFileProcessor:

                if (packFileName.indexOf('.') == -1 || packFileName.endsWith(".png") || packFileName.endsWith(".jpg"))
                        packFileName += ".atlas";

This is not done upon loading: from aurelienribon.texturepackergui.Canvas.java:

    public String getFilename() {return filename.equals("") ? getName() + ".pack" : filename;}

Original issue reported on code.google.com by [e-mail] on 18 Nov 2013 at 10:06