[2.1.8] Pink artefact in concrete.png, stone-path.png and foundation.png

[Ingo-Igel]

There are pink artefacts in the first row of each of the following files: 'concrete.png' and 'stone-path.png' under 'data\base\graphics\terrain\water-transitions', and 'foundation.png' under 'data\space-age\graphics\terrain\water-transitions'.

pics