win64 mysqli issues

Ulf, Andrey, I've two purposes in this writing. Working on the branch for size_t and int64 support I've again faced the fact, that the issue below still isn't fixed https://bugs.php.net/bug.php?id=65486 That means it still persists in the 5.5 branch. Of course it becomes more grave now as 5.6 scratches the door, so once fixed there str_size_and_int64 branch could profit as well. Ulf, Andrey, I still think the best way were you to have a look on that issue. Another thing in str_size_and_int64 branch is about mysqlnd which is using 'unsigned int' for length almost everywhere. Till now I could get it working with mysqli and mysql, but I think mysqlnd is something one should take more care of. So maybe that were also something you could take a look at. The progress and current assigned items are indicated here https://wiki.php.net/rfc/string-size_t/progress . Thanks Anatol