fix printf format for zend_ulong

Author: marc-mabe

ext/standard/math.c

@@ -1147,7 +1147,7 @@ PHPAPI zend_string *_php_math_number_format_long(zend_long num, int dec, const c
 	char cur_char;
 	int roundup = 0;
 
-	tmpbuf = strpprintf(0, "%lu", num_abs);
+	tmpbuf = strpprintf(0, ZEND_ULONG_FMT, num_abs);
 
 	/* rounding more places than length of num
 	 * or same places of length of num with rounding down