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Silence compiler warnings

Rearrange a bit of code to ensure that 'mode' in LWLockRelease isobviously always set, which seems a bit cleaner and avoids a compilerwarning (thanks to Robert for the suggestion!).Back-patch back to 9.5 where the warning is first seen.Author: Stephen FrostDiscussion:https://postgr.es/m/20161129152102.GR13284%40tamriel.snowman.net

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src/backend/storage/lmgr
- lwlock.c

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-5

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`‎src/backend/storage/lmgr/lwlock.c`

Lines changed: 4 additions & 5 deletions

Original file line number	Diff line number	Diff line change
`@@ -1781,15 +1781,14 @@ LWLockRelease(LWLock *lock)`
`1781`	`1781`	`* be the latest-acquired lock; so search array backwards.`
`1782`	`1782`	`*/`
`1783`	`1783`	`for (i=num_held_lwlocks;--i >=0;)`
`1784`		`-{`
`1785`	`1784`	`if (lock==held_lwlocks[i].lock)`
`1786`		`-{`
`1787`		`-mode=held_lwlocks[i].mode;`
`1788`	`1785`	`break;`
`1789`		`-}`
`1790`		`-}`
	`1786`	`+`
`1791`	`1787`	`if (i<0)`
`1792`	`1788`	`elog(ERROR,"lock %s %d is not held",T_NAME(lock),T_ID(lock));`
	`1789`	`+`
	`1790`	`+mode=held_lwlocks[i].mode;`
	`1791`	`+`
`1793`	`1792`	`num_held_lwlocks--;`
`1794`	`1793`	`for (;i<num_held_lwlocks;i++)`
`1795`	`1794`	`held_lwlocks[i]=held_lwlocks[i+1];`

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Commit5099e8e

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`‎src/backend/storage/lmgr/lwlock.c`

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