Set args.Result to 0 in PlayerAnnounce hook

In
8204e2b3f9,
`PlayerAnnounceResult` was introduced, replacing `HookResult`, which changed
the result for `PlayerAnnounce` to a byte called `PlayerAnnounceResult`.
There are two options, `SendToPlayer` and `WriteToConsole`, set to 1 and 2
respectively. Because TShock handles this, we're setting it to 0, i.e.,
don't notify anybody.

TShockAPI/TShock.cs

@@ -254,7 +254,7 @@ namespace TShockAPI
 			OTAPI.Hooks.NetMessage.PlayerAnnounce += (sender, args) =>
 			{
 				//TShock handles this
-				args.Result = OTAPI.HookResult.Cancel;
+				args.Result = 0;
 			};
 			// if sqlite.interop cannot be found, try and search the runtimes folder. this usually happens when debugging tsapi
 			// since it does not have the dependency installed directly