bluedroid: fix -Wchar-subscripts warning
'unsigner char' cast recommended,
@@ -612,7 +612,7 @@ static UINT8 bta_ag_parse_chld(tBTA_AG_SCB *p_scb, char *p_s)
INT16 idx = -1;
UNUSED(p_scb);
- if (!isdigit(p_s[0])) {
+ if (!isdigit((unsigned char)p_s[0])) {
return BTA_AG_INVALID_CHLD;
}
