Fix encode/decode delimited gencode

[hellraisercenobit]

No description provided.

[alexander-fenster]

Hi @hellraisercenobit,

Can you please add some description of what you're trying to achieve here? It's unclear for me from the code.

Thanks!

[hellraisercenobit]

Hello @alexander-fenster !
Gencode was buggy with encode/decode delimited methods.
encode/decode with multiple fragments was KO.
single fragment was OK.

My fix is just a report of original code into gencode provided by protobuf itself ;)
This PR was already merged a long time ago ^^.

[nihohit]

@alexander-fenster can this be reviewed, please?
We see this issue in the wild.