[PATCH] libio: Fix fmemopen 'w' mode with provided buffer

[Carlos O'Donell]

On 07/16/2015 07:46 AM, Adhemerval Zanella wrote:
> If 'w' mode is used with a provided buffer the fmemopen will try to find
> the first null byte to set as maximum internal stream size.  It should be
> done only for append mode ('a').
> 
> Kudos for Stefan Liebler for finding this error on s390-32.
> 
> --
> 
> 	* libio/fmemopen.c (__fmemopen): Fix 'w' openmode with provided
> 	buffer.
> 	* stdio-common/tst-fmemopen2.c (do_test_with_buffer): Typo.

OK for 2.22

c.