[lwip-devel] [task #10369] Various changes

[Simon Goldschmidt]

Update of task #10369 (project lwip):

                  Status:                    None => Done                   
        Percent Complete:                      0% => 100%                   
             Assigned to:                    None => goldsimon              
             Open/Closed:                    Open => Closed                 

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Follow-up Comment #4:

>> change pbuf->ref from u16_t to s16_t to check for underflows?
> We'd better not. After all, the nature of ref is unsigned.
I think so, too.

>> Add a SIO_FD_X printf-formatter define
> Yet another formatter? Casting to u32_t would do the job

On 64bit architectures, you might get a warning when casting a pointer to
32bit. Instead, I'll leave the cast to size_t and use SZT_F as the
printf-formatter. On 32bit platforms, this should be the same.

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