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Fix debug assertation in lxw_quote_sheetname when unicode character is passed to isalnum function.

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Kühtreiber Antonín 2016-09-16 08:27:02 +02:00
parent a59300f51b
commit 78f1bc9bbe
1 changed files with 1 additions and 1 deletions
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src/utility.c
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@ -441,7 +441,7 @@ lxw_quote_sheetname(const char *str)
/* Check if the sheetname contains any characters that require it
* to be quoted. Also check for single quotes within the string. */
for (i = 0; i < len; i++) {
if (!isalnum(str[i]) && str[i] != '_' && str[i] != '.')
if (!isalnum((unsigned char)str[i]) && str[i] != '_' && str[i] != '.')
needs_quoting = 1;
if (str[i] == '\'') {