Add failsafe to export when other nodes than color are connected to albedo input of Principled BSDF

[ssnd292]

The exports shits itself when another node (like MixRGB) is connected to Albedo input of the Principled BSDF.

Since it doesnt make any sense that the exporter is supposed to read and export mixed input data for Giants Editor anyway, a failsafe should be added to prevent the error from popping up.

Exporting Albedo Color information is more than enough. I guess you can just add a failsafe if any node other than image texture or RGB is connected to albedo input.

[StjerneIdioten]

I don't know if it doesn't make sense per say, since the export could export the mixed data as a final image ;) But as for now no, it shouldn't do that.