ID 306591 - Projecting a full black image seems to be creating possible artefacts

Problem summary
Projecting a full black image seems to be creating possible artefacts across the geometry.  

Customer reported version
3.2v1
Customer reported platform
ubuntu

Steps to reproduce

1) Open the attached archives or Example Head
2) Create a new layer above a transparent base layer for visibility
3) Change the input file path of your projector to 'black.png' (attached)
4) Project
5) Check projected areas for artefacts and transparent areas for spread

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Workaround
Unknown. 

Reproduced by support
3.3v1 - Windows 7, 10, CentOS6, OSX 10.12.4
3.2v1
3.1v3
3.1v1
3.0v4
3.0v1
2.6v5 - Windows 7, CentOS6, OSX 10.12.4

Earliest version tested
Not tested further back than 2.6v5
Expected behaviour
The full area covered by the image should be projected.

Actual behaviour
Some areas were left unprojected, leaving small artefacts and some areas not facing the projector were affected.