Error with 'luaimageembed' on Windows

[Max Chernoff]

Hi Rolf,


> I get the following error on Windows:
> 
> output_filename=luatex.3ah000/image1.png
> libpng error: PNG file corrupted by ASCII conversion

That error, along with these lines from luaimageembed.sty

   ltn12.pump.all(
       ltn12.source.string(data),
       ltn12.sink.chain(
           mime.decode("base64"),
           ltn12.sink.file(io.open(file_name, "a"))
       )
   )
   
   local file = io.open(file_name, "rb")

makes me think that it's replacing all the LFs with CRLFs on Windows.
Can you try changing line 31 of luaimageembed.sty from

   ltn12.sink.file(io.open(file_name, "a"))

to

   ltn12.sink.file(io.open(file_name, "ba"))

(untested)

Thanks,
-- Max