mb_split-negative-parameter.patch

diff --git a/ext/mbstring/php_mbregex.c b/ext/mbstring/php_mbregex.c
index 68922b6966..bc34f19e30 100644
--- a/ext/mbstring/php_mbregex.c
+++ b/ext/mbstring/php_mbregex.c
@@ -1296,8 +1296,8 @@ PHP_FUNCTION(mb_split)
        }

        /* otherwise we just have one last element to add to the array */
-       n = ((OnigUChar *)(string + string_len) - chunk_pos);
-       if (n > 0) {
+       if ((OnigUChar *)(string + string_len) > chunk_pos) {
+               n = ((OnigUChar *)(string + string_len) - chunk_pos);
                add_next_index_stringl(return_value, (char *)chunk_pos, n);
        } else {
                add_next_index_stringl(return_value, "", 0);