IDA 6.6 fix

Hello

As you kindly suggested, I fixed ExtractMachO for IDA 6.6

Aside from the dialog (8fd89a8), there was an issue with findAddress type (ea_t would not fit nicely in a int on 64-bit) so the while would never equals to BADADDR: infinite loop.

Side effect was broken HASH_FIND (FAT filter), so I hardcoded HASH_FIND keylen (0ca7e3f).

Cheers.

Arnaud