Send 0/1 as value in quest completion check

[rookgaard]

Pull Request Prelude

• I have followed proper The Forgotten Server code styling.
• I have read and understood the contribution guidelines before making this PR.
• I am aware that this PR may be closed if the above-mentioned criteria are not fulfilled.

Changes Proposed

We should send 0 or 1 as value instead of true/false in addByte, just like here

forgottenserver/data/lib/core/player.lua

Line 380 in a904904

msg:addByte(available and 0x01 or 0x00) -- market

[ranisalt]

I don't get why Lua had to reinvent every single behavior. It's the only language I know that can't coerce booleans to 0/1 lol