main/php_syslog: make xdigits static

Author: MaxKellermann

main/php_syslog.c

@@ -58,7 +58,7 @@ PHPAPI void php_syslog_str(int priority, const zend_string* message)
 		} else if ((c < 0x20) && (PG(syslog_filter) == PHP_SYSLOG_FILTER_ALL)) {
 			smart_string_appendc(&sbuf, c);
 		} else {
-			const char xdigits[] = "0123456789abcdef";
+			static const char xdigits[] = "0123456789abcdef";
 
 			smart_string_appendl(&sbuf, "\\x", 2);
 			smart_string_appendc(&sbuf, xdigits[c >> 4]);