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Fix compiler warning.

Kevin Gritter reports that his compiler complains about inq and outqbeing possibly-uninitialized at the point where they are passed toshm_mq_attach(). They are initialized by the call tosetup_dynamic_shared_memory, but apparently his compiler is inliningthat function and then having doubts about whether the for loop willalways execute at least once. Fix by initializing them to NULL.

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contrib/test_shm_mq
- setup.c

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`‎contrib/test_shm_mq/setup.c`

Lines changed: 2 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -50,8 +50,8 @@ test_shm_mq_setup(uint64 queue_size, int32 nworkers, dsm_segment **segp,`
`50`	`50`	`{`
`51`	`51`	`dsm_segment*seg;`
`52`	`52`	`test_shm_mq_header*hdr;`
`53`		`-shm_mq*outq;`
`54`		`-shm_mq*inq;`
	`53`	`+shm_mqoutq=NULL;/ placate compiler */`
	`54`	`+shm_mqinq=NULL;/ placate compiler */`
`55`	`55`	`worker_state*wstate;`
`56`	`56`
`57`	`57`	`/* Set up a dynamic shared memory segment. */`

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Commitd89746c

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`‎contrib/test_shm_mq/setup.c`

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