Update fixes.inc

Okay, so I learned not to edit forks in Pawno (or bad things happen). I've decided to write the code again, but this time they are all connected to one ("SetCamera").

I've also hooked "TogglePlayerSpectating" to use a bit flag that determines the player's spectator mode. I've added this because "GetPlayerState" doesn't return "PLAYER_STATE_SPECTATING" right after enabling spectator mode (only the camera functions use that bit flag, as it is part of the fix).

If there is any code that doesn't conform to the "fixes.inc" style, please say so.