Fix transparency when editing images with GLSL-based nodes

[Correct-Syntax]

For some reason, when using GLSL-based nodes, the image turns partially transparent. This issue should figure out the cause and solve it.

Not using GLSL-based nodes

Using GLSL-based nodes

[yonMaor]

Does this issue occur with all GLSL nodes?

[Correct-Syntax]

It seems like all the GLSL nodes except for:

• Opacity
• Edge detection

have some sort of issue.

The Color Balance node only has this issue when you adjust the sliders, so it is likely a bug with the actual glsl itself. That could be the problem with the rest as well.

The Brightness/Contrast node has the issue when changing contrast slider to above around 100

The Gamma node also has a similar problem once the slider value is raised to a certain point.

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