No need to check for "-" sign on unsigned number

Author: marc-mabe

ext/standard/math.c

@@ -1217,7 +1217,7 @@ PHPAPI zend_string *_php_math_number_format_long(zend_long num, int dec, const c
 	topad = 0;
 	while (s >= ZSTR_VAL(tmpbuf)) {
 		cur_char = *s--;
-		if (roundup && cur_char != '-') {
+		if (roundup) {
 			if (cur_char < '9') {
 				cur_char++;
 				roundup = 0;