blender/source/blender/collada/EffectExporter.h and blender/source/blender/collada/ImageExporter.h both define methods but include the class name in the method signature in the header file (i.e. void ImagesExporter::export_UV_Images(); in ImageExporter.h should be declared as void export_UV_Images();)

Anyway, this patch simply fixes the method declarations so that the code compiles.