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Fix unportable usage of <ctype.h> functions.

isdigit(), isspace(), etc are likely to give surprising results if passed asigned char. We should always cast the argument to unsigned char to avoidthat. Error in commit63d6b97, found by buildfarm member gaur.Back-patch to 9.3, like that commit.

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src/interfaces/ecpg/ecpglib
- data.c

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`‎src/interfaces/ecpg/ecpglib/data.c`

Lines changed: 1 addition & 1 deletion

Original file line number	Diff line number	Diff line change
`@@ -57,7 +57,7 @@ garbage_left(enum ARRAY_TYPE isarray, char **scan_length, enum COMPAT_MODE compa`
`57`	`57`	`/* skip invalid characters */`
`58`	`58`	`do {`
`59`	`59`	`(*scan_length)++;`
`60`		`-}while (isdigit(**scan_length));`
	`60`	`+}while (isdigit((unsignedchar)**scan_length));`
`61`	`61`	`}`
`62`	`62`
`63`	`63`	`if (scan_length!=' '&&scan_length!='\0')`

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Commitd1f9ac5

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`‎src/interfaces/ecpg/ecpglib/data.c`

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