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Avoid null pointer dereference crash after OOM in Snowball stemmers.

Absorb upstream bug fix (their commite322673a841d9abd69994ae8cd20e191090b6ef4), which prevents a nullpointer dereference crash if SN_create_env() gets a malloc failureat just the wrong point.Thanks to Maksim Korotkov for discovering the null-pointerbug and submitting the fix to upstream snowball.Reported-by: Maksim Korotkov <m.korotkov@postgrespro.ru>Author: Maksim Korotkov <m.korotkov@postgrespro.ru>Discussion:https://postgr.es/m/1d1a46-67ab1000-21-80c451@83151435Backpatch-through: 13

1 parent49a4508 commit7edd2cbCopy full SHA for 7edd2cb

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src/backend/snowball/libstemmer
- api.c

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`‎src/backend/snowball/libstemmer/api.c`

Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -34,7 +34,7 @@ extern struct SN_env * SN_create_env(int S_size, int I_size)`
`34`	`34`	`externvoidSN_close_env(structSN_env*z,intS_size)`
`35`	`35`	`{`
`36`	`36`	`if (z==NULL)return;`
`37`		`-if (S_size)`
	`37`	`+if (z->S)`
`38`	`38`	`{`
`39`	`39`	`inti;`
`40`	`40`	`for (i=0;i<S_size;i++)`

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Commit7edd2cb

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`‎src/backend/snowball/libstemmer/api.c`

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