Fix instant abilities

[XNihili]

If the client said success, and the server said fail, then my client should be corrected. Basic freaking redundancy verification Square-Enix. It's almost like they're five years behind everything else in the MMO market. Korea pumps out games with quality international level netcode on a weekly basis, yet here we are dealing with this garbage... it's out of control.
Can't even handle error-checking on a single instant ability.

And if my client say I have billion of gil and one of those house, I should have them
This game is not very good latency wise but people's "solutions" will always make me crack a smile.