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Silence negative array index warning with toupper

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Cast to (unsigned char).
This commit is contained in:
Mark Andrews 2022-08-19 11:13:59 +10:00
parent ee72d4f2f0
commit ea13820023
1 changed files with 1 additions and 1 deletions
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2
lib/isccfg/duration.c
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@ -63,7 +63,7 @@ isccfg_duration_fromtext(isc_textregion_t *source,
duration->unlimited = false;
/* Every duration starts with 'P' */
if (toupper(str[0]) != 'P') {
if (toupper((unsigned char)str[0]) != 'P') {
return (ISC_R_BADNUMBER);
}
P = str;