Philip Withnall 4795dadde4 gsubprocess: Clear std buf outputs to NULL on failure ...

Instead of sometimes returning a non-NULL buffer, always return NULL.
However, keep the documentation as explicitly returning undefined values
on failure, so that we can change the behaviour in future if needed.

The return values weren’t defined for failure before, so were
implicitly returning undefined values.

Signed-off-by: Philip Withnall <withnall@endlessm.com>

2018-10-11 11:31:27 +13:00

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