Description:
------------
```
PHPAPI char *php_raw_url_encode(char const *s, int len, int *new_length)
{
	register int x, y;
	unsigned char *str;

	str = (unsigned char *) safe_emalloc(3, len, 1);
	for (x = 0, y = 0; len--; x++, y++) {
	str[y] = (unsigned char) s[x];
```

PoC:
```
<?php

ini_set('memory_limit', -1);
rawurlencode(str_repeat('&', 0xffffffff/3));

?>
```

Fix:
```
-	register int x, y;
+	register unsigned int x, y;
```