RE: [PATCH] eliminate compiler warning for xpc_channel.c

["Luck, Tony" <tony.luck@xxxxxxxxx>]

>> Did you mean to say "*msg = NULL"?
>
> this is actually an ANSI-permitted idiom for shutting up compiler
> warnings while not actually initialising the variable.

So I learned something new today!

But then this patch is wrong ... it shuts the compiler up
and leaves 4 ways that xpc_allocate_msg() can return without doing
the initialization, so that msg will be used uninitialized.

-Tony
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