D23159: Prevent error() being emitted when purposefully reading 0 bytes

[Alexander Saoutkin]

feverfew added inline comments.

INLINE COMMENTS

> apol wrote in file.cpp:520
> this should be
> 
>   {
>       Q_EMIT data({});`
>       return;
>   }
> 
> I'm not sure that we'd need an empty data emitted then. Are you trying to fix a specific bug that triggers this?

I('ve not seen any IOSlave use a Q_EMIT macro, any reason why it's necessary here (what's the change in the behaviour).

Please re-read the summary, carefully, the error is subtle.

> apol wrote in file.cpp:526
> alternatively this could also check ` && bytes != 0`

Please reread the summary, this would not fix the bug.

REPOSITORY
  R241 KIO

REVISION DETAIL
  https://phabricator.kde.org/D23159

To: feverfew, dfaure, fvogt, chinmoyr
Cc: apol, kfm-devel, kde-frameworks-devel, LeGast00n, michaelh, ngraham, bruns
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